In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Authorities don’t know what killed a couple and three of their children who were found dead at their Utah home Saturday night, but on Sunday police ruled out a violent assault. 
  
 Benjamin and Kristi Strack, ages 37 and 36 respectively, and their son Benson, 14, daughter Emery, 12, and son Zion, 11, were found dead by another son at their home in Springville, a suburb of Provo, according to Springville police. A preliminary autopsy found no evidence of stab wounds, gunshot wounds or other trauma, police said. 
  
 Cause of death will not be determined until lab results are complete, and the state medical examiner’s office has not said when that will be, police said. The medical examiner has indicated that the next step is to analyze blood samples, police said. 
  
 The family lived in a duplex, and the people in the other half of the building were unharmed. 
  
 Lt. Dave Caron of the Springville Department of Public Safety said firefighters tested the air and did not find any carbon monoxide. But the gas could have dissipated before the test, he said. 
  
 The Associated Press contributed to this report. 
  
 For more news from the U.S. and beyond, follow @raablauren on Twitter. ||||| Proposal: Some Utah college students would pay no tuition, fees for 2 years ||||| SPRINGVILLE, Utah (AP) — Police say a preliminary autopsy has ruled out any violent assault in the deaths of five Utah family members including three children. 
  
 Springville police officers stand outside a house where a family of five, a father, 36, a mother, 37, and children ages 14,12,11, was found dead in Springville, Utah, on Saturday, Sept. 27, 2014. (AP... (Associated Press) 
  
 Springville Police investigate the scene where five people were found dead in a home in Springville, Utah, on Saturday, Sept. 27, 2014. (AP Photo/The Salt Lake Tribune, Rick Egan) DESERET NEWS OUT; LOCAL... (Associated Press) 
  
 Springville Police investigate the scene where five people were found dead in a home in Springville, Utah, on Saturday, Sept. 27, 2014. (AP Photo/The Salt Lake Tribune, Rick Egan) DESERET NEWS OUT; LOCAL... (Associated Press) 
  
 Springville Police investigate the scene where five people were found dead in a home in Springville, Utah, on Saturday, Sept. 27, 2014. (AP Photo/The Salt Lake Tribune, Rick Egan) DESERET NEWS OUT; LOCAL... (Associated Press) 
  
 There was no evidence of stabbing or gunshot wounds or other visible injuries to the five found dead Saturday night in their home in Springville, about 45 miles south of Salt Lake City, investigators said. 
  
 The five were identified Sunday as Benjamin Strack, 37, his wife, Kristi, 36, and three of their children, Benson, 14, Emery, 12, and Zion, 11. 
  
 Police Lt. Dave Caron said the cause of death has not been determined, and will not be until an analysis of blood samples is concluded. The medical examiner's office provided no time frame for the release of results of laboratory testing. 
  
 While a test of air in the house by firefighters did not find any carbon monoxide, investigators have not ruled that out as the cause of death. 
  
 The front door of the house was open and the back door was cracked open before firefighters arrived, Caron said, and the gas could have ventilated before the test. 
  
 Asked whether foul play has been ruled out, Caron told The Associated Press, "I don't rule out anything ... We haven't ruled out anything except there was no violent trauma. We're going to look at everything. 
  
 "I do know when I was in there (house) I didn't see anything that would suggest a struggle ... I saw nothing like that," he added. 
  
 The bodies were found shortly before 8 p.m. in the parents' bedroom by an older son, who went to the duplex after he did not hear from the family as expected, according to investigators. His name was not released. 
  
 Caron said someone either saw or talked to the family Saturday morning, but he was unsure about the last person to make contact with them. 
  
 "It's one of those things we're going to take it one step at a time," he said, adding the next step is to await the analysis of blood samples. 
  
 The duplex where the family lived is located on a road leading to a high school in the city of 30,000 located just south of Provo. |||||
A: 
A tragedy—and a mystery—arose Saturday night in Utah, where a couple and three of their kids were found dead in their home. Benjamin and Kristi Strack, 37 and 36, respectively, and their sons Benson, 14, and Zion, 11, as well as their daughter Emery, 12, were found—all together in the parents' bedroom—by another son and his grandma in the Provo suburb; police found no evidence of trauma and ruled out the possibility of a violent assault. Lab results are pending, and police say blood analysis is the next step, KSL reports. No carbon monoxide was found in the air, but an official notes that gas could have dissipated before the air was tested, the Los Angeles Times reports. "We haven't ruled out anything except there was no violent trauma," he says, as per the AP. "We're going to look at everything." Animals who lived in the home were uninjured, as were neighbors who live in the other half of the duplex.