Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: UPPER WEST SIDE — A nanny working for a prominent television executive stabbed two of his young children to death in their luxury West 75th Street apartment Thursday evening and then turned the knife on herself in a nightmare scene that left neighbors stunned, officials said. 
  
 Marina Krim, the doting mom of little Lucia Krim, 6, and Leo Krim, 2, made the horrifying discovery just after 5:30 p.m. in the second floor apartment at 57 W. 75th St., just off Central Park West, after returning home from a swim lesson with her daughter, Nessie Krim, 3. 
  
 Police Commissioner Raymond Kelly told reporters Marina Krim, who is married to CNBC digital media senior vice president Kevin Krim, found her apartment dark and seemingly empty and went to ask the doorman if her two other children and the nanny, identified as Yoselyn Ortega, 50, had left, Kelly said. 
  
 When she returned to the apartment, she found her young children in the bathtub with multiple stab wounds and ran out of the apartment screaming, said Lucianne Minihan, whose husband, Michael, is the superintendent at 57 W. 75th St. 
  
 "The whole building heard it," Lucianne Minihan said. "She was screaming at the top of her lungs. She was screaming, 'Help me! Help me!'" 
  
 Hearing the screams, the superintendent raced upstairs, went into the apartment and saw blood everywhere, Minihan said. 
  
 He heard a strange grunting noise, looked through a bedroom doorway, and saw the nanny stabbing herself, according to Minihan. 
  
 The super ran out of the apartment, closed the front door and yelled at his neighbors to call the police. He held the door closed until police came, Minihan said. 
  
 Ortega was taken to New York Presbyterian-Weill Cornell Medical Center in critical but stable condition with self-inflicted wounds to her throat, police said. Charges have not yet been filed. 
  
 The horrific crime sent shockwaves through a neighborhood where many parents rely on nannies to help raise their children. 
  
 "It brings to the surface the fears every parent has when leaving their children with anyone but family," wrote an Upper West Side mom on her blog. "We can do all the background checks in the world, and we know that most caregivers are amazing and loving, but it's the random, horrific incidents like this that stay in our heads as we walk out the door and leave our children." 
  
 The children were pronounced dead at St. Luke's Hospital and their mother was taken there for trauma, according to NYPD spokesman Paul Browne. 
  
 Cops found a kitchen knife on the bathroom floor, police said. 
  
 Marina Krim's love for her young children was detailed in an online diary, which was loaded with smiling photos of a thriving, happy-looking family. 
  
 Pictures show the Krim children, who moved to New York about two and a half years ago from San Francisco, embracing their lives in New York, with Lulu munching on a hotdog and Nessie stopping at pay phones on Broadway to make pretend phone calls. 
  
 Lulu Krim attended the dual-language Spanish program at the highly-regarded neighborhood school P.S. 87, according to the diary. 
  
 "One of the best parts of my day is after I drop both girls off at school and have 3 precious hours with little Lito all to myself," Marina Krim wrote. "Ok, I'm near getting cheesy I adore this boy so much!!!" 
  
 Leo had just celebrated his second birthday last month. 
  
 Marina Krim's latest entry was made just hours before her grisly discovery. 
  
 "Leo speaks in the most adorable way possible," Krim wrote. "Firstly, he speaks super clearly, so you can understand every word is he is saying." 
  
 The family had employed Ortega, nicknamed "Josie," for two and a half years, family member said. 
  
 Earlier this year, the Krims visited Josie's "amazing familia" in the Dominican Republic, where the nanny's relatives nicknamed Nessie “Rapida y Furiosa" (Fast and Furious) and several posts show the childrens' hair styled by Ortega. 
  
 Neighbors at Ortega's Harlem apartment building were shocked by her alleged crime. Ortega has lived in the neighborhood for at least 20 years, neighbors said, and has a son in his 20s. Four sisters of Ortega's also live in the building, neighbors said. 
  
 "She's a nice polite woman, calm, never aggressive, a good person, never violent behavior, nothing ever extreme," said neighbor Andre Valdez, 39. "I'm surprised, it's absurd. I don't even believe she would do something like this." 
  
 Detectives left the apartment building about 11 p.m. Thursday with several of Ortega's family members, who covered their faces with jackets. ||||| “It’s family-oriented, this neighborhood,” said Pauline Sklar, a real estate investor who lives a block from the building where the children were stabbed. “Parents are working. They have to depend on people. My niece hires people. She researches them.” 
  
 Ms. Sklar paused, then added, “Or tries to.” 
  
 Nannies are there for meal times, for bedtime, for birthdays and holidays, and go on vacations. Indeed, on her blog, Ms. Krim described how she and her family had spent several days visiting Ms. Ortega’s family in the Dominican Republic, speaking to just how close her relationship had been with the family. 
  
 “We spent the past 9 days in the Dominican Republic. We spent half the time at our nanny, Josie’s sisters home in Santiago,” she wrote. “We met Josie’s amazing familia!!! And the Dominican Republic is a wonderful country!! More pics to come!!” 
  
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 Commissioner Kelly said that given the horror Ms. Krim had just witnessed, it was difficult for her to communicate. Mr. Krim was told of the situation hours later, when he landed after a flight back to the city. He was met at the airport by the police, who told him what happened and took him to see his wife at St. Luke’s Hospital, where the couple remained on Thursday night, along with Ms. Krim’s sister. 
  
 There were no immediate explanations for what drove the nanny’s actions. Paul J. Browne, the Police Department’s chief spokesman, said he did not know if she left a note behind, and he could not immediately say how long she had worked for the family. The Krims moved to New York from California in recent years, neighbors said. 
  
 A Harvard graduate, according to his LinkedIn profile, Mr. Krim is an executive at CNBC and had previously worked at Bloomberg and Yahoo. 
  
 Ms. Krim had worked in California for a wholesaler of powders made from exotic fruits, like acai berries and pomegranates, according to her LinkedIn profile. 
  
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 A neighbor said that in New York, Ms. Krim largely devoted her time to her children. This past year she taught a weekly early-childhood art class at the Hippo Playground Parkhouse on 91st Street. 
  
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 “Marina likes strolls in Central Park, doing art projects with the kids and delicious food,” according to a Web site set up for the wedding of one of Ms. Krim’s siblings. 
  
 In one post on her blog, Ms. Krim talked about how she cherished her time with her youngest, Leo, nicknamed Lito. 
  
 “One of the best parts of my day is after I drop both girls off at school and have 3 precious hours with little Lito all to myself. Ok, I’m near getting cheesy I adore this boy so much!!! He’s obsessed with collecting acorns he finds ‘on the floor,’ he loves riding ‘the school bus’ and he happily plays by himself for long periods of time. Here he has set up his kitchen in the living room and is ‘making bacon’ (not sure where he learned the word ‘bacon’).” 
  
 Ms. Ortega lives a few miles away, on Riverside Drive in Harlem. Marcelina Lovera, a neighbor of Ms. Ortega, said she had moved to New York from the Dominican Republic. She had not been officially charged as of Thursday night. 
  
 “I’m still shocked,” Ms. Lovera said. “She seems like a normal person. I wouldn’t expect that from her.” 
  
 Photo 
  
 Outside Ms. Ortega’s apartment, a woman could be heard through the closed door wailing, “Por qué dios mio, por qué?” 
  
 Neighbors said she lived with her three sisters and had an adolescent son. They described her as industrious and unremarkable. All expressed disbelief that she could commit a crime so heinous. 
  
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 On the Upper West Side, neighbors described seeing Ms. Krim, a towel over her head, clinging to her one surviving child, being escorted by the police to a waiting ambulance. 
  
 Ms. Starr said that when she saw Ms. Krim in the building’s lobby, she was in a state of shock. “She was screaming in a psychotic state,” she said. “She was not lucid.” 
  
 Ms. Starr said she did not know her neighbor well but described a young, loving couple, often seen on neighborhood streets with a big, friendly greyhound named Babar. 
  
 She had seen Ms. Ortega in the building, she said, but never got the sense of anything being out of the ordinary. 
  
 “I rode in the elevator with the nanny just the day before yesterday,” Ms. Starr said. “I was making small talk. She was sort of unfriendly, didn’t want to interact. But I didn’t notice anything strange or weird.” ||||| Hordes of cops stormed the building after the mother's neighbor heard her screams and dialed 911. Marina Krim, who neighbors said may have worked as a pediatrician, was seen afterward being escorted into an ambulance, tightly clutching her surviving daughter Nessie. 
  
  
  
 "She was mumbling words, incoherent," said Stephanie Herman, 58. "I can't imagine experiencing something like this. 
  
  
  
 "This is a very family-oriented area. You see moms and their strollers a lot. Many people hire nannies here. This is everyone's worst nightmare." 
  
  
  
 Sources said blood was found in the kitchen, suggesting that's where the attack may have started or where Ortega might have first tried to take her own life. 
  
  
  
 It was unclear how long Ortega had worked for the family or what might have set her off, cops said. The police would not say how many times the children had been stabbed. 
  
  
  
 The prewar, 81-unit La Rochelle — boasting white-gloved doormen and a lobby bathed in marble — is less than a block from Central Park. Three-bedroom apartments rent for nearly $11,000 a month. 
  
  
  
 The barbaric crime in one of the city's wealthiest neighborhoods left neighbors horrified. 
  
  
  
 "It's awful. It makes me sick to my stomach," said Jill Pace, 27, who lives in the area. "I can't even look at the building. You have to wonder what goes through someone's mind to do such a horrible thing." 
  
  
  
 Segundo Mores, 48, said the murders will likely make parents more vigilant when screening nannies. 
  
  
  
 "Obviously, parents need to do criminal and even psychological background checks," Mores said. "These are your kids. Your most precious possession. Oftentimes, people hire nannies from word of mouth. That is not going to be enough anymore." 
  
  
  
 With Joe Kemp, Denis Slattery and Rocco Parascandola 
  
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Output:
New York City cops are trying to piece together a horrific double-murder today: Police say a mother returned to her Upper West Side apartment to discover that two of her young children had been fatally stabbed in the bathtub by their nanny, report DNA Info and the Daily News. Most reports have the victims as a 2-year-old boy and a 6-year-old girl. When the mother discovered the scene and ran screaming from the apartment, the nanny then apparently turned the knife on herself and is not expected to survive, reports the New York Times. "She was screaming at the top of her lungs," a resident says of the mother. "She was screaming, 'Help me! Help me!'"