Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Example Input: Context: The film opens in 19th century Maryland where several Baltimore policemen are chasing after the screams of a woman in an apartment. The police arrive at the apartment in time only to discover a woman (Jasmina Ilic) sprawled on the floor with her throat sliced open and the corpse of her daughter (Teodora Uveric) stuffed in the chimney. Detective Emmett Fields (Luke Evans) is called to assist in the investigation and discovers that the crime resembles a fictional murder in the short story The Murders in the Rue Morgue, which is part of a collection of stories penned by the writer Edgar Allan Poe (John Cusak).Poe has become a social pariah and penniless drunkard whose stories have not been circulated for some time. He has fallen in love with the beautiful young Emily Hamilton (Alice Eve) and desires to marry her but faces opposition from her father Captain Charles Hamilton (Brendan Gleeson), a military man who loathes Poe and goes to the length of threatening physical violence. Poe is brought to see Fields for questioning and is horrified to learn someone is using his stories as the backdrop for a series of murders. Fields then proposes that Poe volunteer his services to help the police catch the killer and Poe agrees to the task.The two men are called to investigate the murder of literary critic Rufus Griswold (John Warnaby), the man who became Poe's rival after a feud that was published in the Baltimore newspapers. Poe realizes the gruesome crime resembles a scene from The Pit and the Pendulum as Fields notices a red demon mask near the corpse. The two then deduce that the scene of the next crime will take place at Captain Hamilton's annual masquerade ball a scene that will resemble the Masked Ball in The Masque of the Red Death.Fields assigns several members of the Baltimore Police to go undercover as guests at the Masked Ball. Sometime before midnight, at the height of the festivities, a man on horseback dressed in a skeleton costume appears. Fields shoots the man only to learn he was an actor hired for the entertainment and receives an anonymous note. Poe then realizes Emily has been kidnapped, meaning the event was all a distraction. It's revealed in the killer's note that he will continue to commit murders and leave clues to Emily's location. The killer then threatens to kill Emily if Poe does not start writing columns for the newspaper that describe the brutal combination of fact and fiction forcing Poe to comply with the request in order to save Emily.The local Medical School's anatomy class discovers a live raven and the corpse of a prostitute in theatrical clothing. Poe and Fields investigate and deduce the scene resembles The Mystery of Marie Roget except for one detail the blood on the corpse's hands was not an element of Poe's story. The two soon learn the woman was an actress (Ana Sofrenovic) in costume as Lady Macbeth and rush to the theatre where the victim worked, demanding to see all the stage hands. All the stage hands are accounted for except for Maurice Rabichaux (Dejan Cubrilov), a sailor on leave after his ship landed in Baltimore. Poe and Fields notice a mysterious figure running along the catwalks and pursue him but the figure escapes. Fields later makes an off-handed comment that the name of the ship Maurice arrived on is the Fortunato which prompts Poe to realize the next murder will resemble The Cask of Amontillado.Poe and Fields search tunnels under the city with several policemen and discover an area with fresh brickwork, an area that might be where Emily is being held. The officers smash through the brick and discover what appears to be a woman with blonde hair in the costume Emily wore the night she was kidnapped. But the body is revealed to be that of the sailor Maurice, who was dressed to resemble Emily after he was killed and buried in the niche. Two clues are found on Maurice: a pocket watch that was stopped at 12:27 and then stuffed into his mouth, and a tattoo on his back that had some flesh carved out of it. Poe and Fields deduce these clues will give the location of Emily, and Poe realizes a church in Baltimore called Holy Cross is where Emily 
 Question: Who is brought to the fields for questioning ?
Example Output: poe

Example Input: Context: To understand minerals, we must first understand matter. Matter is the substance that physical objects are made of. The basic unit of matter is an atom. At the center of an atom is its nucleus. Protons are positively charged particles in the nucleus. Also in the nucleus are neutrons with no electrical charge. Orbiting the nucleus are tiny electrons. Electrons are negatively charged. An atom with the same number of protons and electrons is electrically neutral. If the atom has more or less electrons to protons it is called an ion. An ion will have positive charge if it has more protons than electrons. It will have negative charge if it has more electrons than protons. An atom is the smallest unit of a chemical element. That is, an atom has all the properties of that element. All atoms of the same element have the same number of protons. A molecule is the smallest unit of a chemical compound. A compound is a substance made of two or more elements. The elements in a chemical compound are always present in a certain ratio. Water is probably one of the simplest compounds that you know. A water molecule is made of two hydrogen atoms and one oxygen atom (Figure 3.2). All water molecules have the same ratio: two hydrogen atoms to one oxygen atom. A mineral is a solid material that forms by a natural process. A mineral can be made of an element or a compound. It has a specific chemical composition that is different from other minerals. One minerals physical properties differ from others. These properties include crystal structure, hardness, density and color. Each is made of different elements. Each has different physical properties. For example, silver is a soft, shiny metal. Salt is a white, cube- shaped crystal. Diamond is an extremely hard, translucent crystal. Minerals are made by natural processes. The processes that make minerals happen in or on the Earth. For example, when hot lava cools, mineral crystals form. Minerals also precipitate from water. Some minerals grow when rocks are exposed to high pressures and temperatures. Could something like a mineral be made by a process that was not natural? People make gemstones in a laboratory. Synthetic diamond is a common one. But that stone is not a mineral. It was not formed by a natural process. A mineral is an inorganic substance. It was not made by living organisms. Organic substances contain carbon. Some organic substances are proteins, carbohydrates, and oils. Everything else is inorganic. In a few cases, living organisms make inorganic materials. The calcium carbonate shells made by marine animals are inorganic. All minerals have a definite chemical makeup. A few minerals are made of only one kind of element. Silver is a mineral made only of silver atoms. Diamond and graphite are both made only of the element carbon. Minerals that are not pure elements are made of chemical compounds. For example, the mineral quartz is made of the compound silicon dioxide, or SiO2 . This compound has one atom of the element silicon for every two atoms of the element oxygen. Each mineral has its own unique chemical formula. For example, the mineral hematite has two iron atoms for every three oxygen atoms. The mineral magnetite has three iron atoms for every four oxygen atoms. Many minerals have very complex chemical formulas that include several elements. However, even in more complicated compounds, the elements occur in definite ratios. Minerals must be solid. For example, ice and water have the same chemical composition. Ice is a solid, so it is a mineral. Water is a liquid, so it is not a mineral. Some solids are not crystals. Glass, or the rock obsidian, are solid but not crystals. In a crystal, the atoms are arranged in a pattern. This pattern is regular and it repeats. Figure 3.3 shows how the atoms are arranged in halite (table salt). Halite contains atoms of sodium and chlorine in a pattern. Notice that the pattern goes in all three dimensions. The pattern of atoms in all halite is the same. Think about all of the grains of salt that are 
 Question: smallest particle of an element that has all the elements properties
Example Output: atom

Example Input: Context: Ca2+ is a ubiquitous intracellular messenger responsible for controlling numerous cellular processes including fertilization, mitosis, neuronal transmission, contraction and relaxation of muscles, gene transcription, and cell death. At rest, the cytoplasmic Ca2+ concentration [Ca2+]i is approximately 100 nM, but this level rises to 500-1,000 nM upon activation. In osteoblasts, the elevation of [Ca2+]i is a result of an increase in the release of Ca2+ from endoplasmic reticulum and/or extracellular Ca2+ influx through voltage gated Ca2+ channels. Many of the cellular effects of Ca2+ are mediated by the Ca2+ binding protein, calmodulin (CaM). Upon binding up to four calcium ions, CaM undergoes a conformational change, which enables it to bind to specific proteins eliciting a specific response. Calmodulin kinase II (CaMKII) is a major target of the Ca(2+)/CaM second messenger system. Once bound to Ca(2+)/CaM, the multimeric CaMKII is released from its autoinhibitory status and maximally activated, which then leads to an intraholoenzyme autophosphorylation reaction. Calcineurin (Cn) is another major target protein that is activated by Ca(2+)/CaM. Cn is a serine-threonine phosphatase that consists of a heterodimeric protein complex composed of a catalytic subunit (CnA) and a regulatory subunit (CnB). Upon activation, Cn directly binds to, and dephosphorylates nuclear factor of activated T cells (NFAT) transcription factors within the cytoplasm allowing them to translocate to the nucleus and participate in the regulation of gene expression. This review will examine the potential mechanisms by which calcium, CaM, CaMKII, and Cn/NFAT control osteoblast proliferation and differentiation. 
 Question: Which calcium/calmodulin dependent protein phosphatase is involved in the activation of the family of NFAT transcription factors (Nuclear Factors of Activated T cells)?
Example Output:
can

