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: 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

Example Input: Context: Rick Riker (Drake Bell) is an unpopular student at Empire High with his only friend Trey (Kevin Hart), living with his uncle Albert (Leslie Nielsen) and Aunt Lucielle (Marion Ross). His crush Jill Johnson (Sara Paxton), who hardly notices him, is dating Rick's bully Lance Landers (Ryan Hansen). Rick and Trey are then shown to be on a school trip to an animal research lab. In the lab Rick meets Lou Landers (Christopher McDonald) who coughs up blood because he is terminally ill. Dr. Strom, the head researcher at the lab, then shows his seven mutated dragonflies, though there are only six there because one has escaped which then bites Rick, and causes his neck to swell.The scene then goes to Rick's house where his Aunt Lucille and Uncle Albert are talking on the couch when Rick comes in. He is very sick, and throws up in a fish tank because of his illness and goes up to his room. Albert and Lucille believe Rick is acting strange, so Albert proceeds to talk to Rick. Rick then passes out from the bite.He wakes up the next morning, with a strange video sent to him from a man wanting to speak to him, later adding Rick as a friend on Facebook. Meanwhile, Lou Landers gets into a scientific accident, transforming into the Hourglass who feeds on human life. At a science fair, with a comically rude and mean-spirited Stephen Hawking who gets physically hurt throughout the film, Rick gets into mishaps, such as becoming stuck to water fountains. He then realizes he has superpowers such as the ability to walk on walls, has incredible strength, but cannot fly. He tests his strength in an alleyway, then decides to test how he can walk up walls. He climbs up and begins to break dance, then has a lie-down on the wall and a cat walks up the wall beside him. He then sees an old woman about to be hit by a truck in the road, and just as she is about to get hit he pushes her out of the way and the truck collides with him stopping it.After his heroic feat he is congratulated by passers-by, but as they are congratulating him he looks to his right and sees he has accidentally pushed the woman into a woodchipper and the dog she was holding the lead of up is slowly getting pulled up into the machine as well. Trey offers to become his sidekick, but Rick resigns. His Uncle and he have a brief fight, which reminds Rick when he was younger and rich with his parents who die in a spoof of Batman Begins. His father urges him to invest of all his money in, not Google, but Enron.Rick later watches the girl of his dreams, Jill, who leaves with Lance in his car. Rick wants a car, and he sets out to get money from the bank. He fails though, with no credit or payment.After his uncle is quickly injured, Rick is met by Xavier (Tracy Morgan) at his school for mutants ala X-Men. Rick is told to make a costume, which he does (and later improves), and he becomes known as the Dragonfly. He quickly becomes a sensation, until his fight with the Hourglass, who ends up cutting him with little hourglass blades. The Hourglass then escapes.Jill is then seen walking in an alleyway and is attacked by thugs, but the Dragonfly saves her. The two then try to kiss, but encounter difficulties as Dragonfly is hanging upside down. They eventually kiss for the first time, and Jill thanks him.The scene then goes to a Thanksgiving dinner at Rick's house. During Thanksgiving Landers visits the family (everyone is unaware he is Hourglass). He nearly catches Rick dressed as the Dragonfly, but later manages to figure out his secret identity.Just as Rick and Jill are about to fall in love, the Hourglass comes in and murders Aunt Lucille. After a comical funeral, Rick decides to throw in the towel as a superhero.Trey and Uncle Albert find Rick after the funeral 
 Question: Who plays Rick riker?
Example Output: drake bell

Example Input: Context: Baghdad, in 2004, three soldiers of an Army bomb-disposal unit are investigating a report of an improvised explosive device (IED). They use a sophisticated robot drone to examine the device, which consists of several undetonated artillery shells wired together and hidden under plastic/fabric sheets. The unit, led by Sgt. Thompson, decides that they can detonate the IED using plastic explosives that they'll activate from a safe distance. Thompson also says that the explosion won't cause very much property damage and should result in no loss of life.A small cart is affixed to the back of the robot, which is then sent back into the blast zone. Before it can reach the IED, the trailer loses a wheel. Thompson dresses in a bulky bomb suit and walks down to the trailer. He picks it up and carries it to the IED, rigging it properly. As he walks back, his partners, Sgt. Sanborn and Specialist Eldridge, scan the immediate area for anyone they consider suspicious or who may be in the blast zone. When Thompson is about 25 meters from the bomb, but still in the kill zone, Eldridge notices a man running a butcher shop who is using a cellular phone. Eldridge yells to Sanborn and the specialist begins to run toward the man, ordering him to drop his phone. Sanborn tells Eldridge to shoot the man, who presses a sequence of numbers on the phone. The bomb detonates with Thompson still in the kill zone. The overpressure from the bomb kills Thompson despite the bomb suit; a large splash of blood hits the inside of the clear visor on his helmet.Thompson's body is packed into a coffin for shipment home, Sanborn supervises the procedure. He looks over Thompson's possessions for a few moments before the coffin is sealed. Back at the base, Eldridge is sitting in the rec room when the base psychologist, Lt. Col. Cambridge walks in and asks Eldridge how he's feeling (in the wake of Thompson's death). Eldridge is still clearly upset over the incident; he dry fires his rifle several times, suggesting that if he'd shot the man with the cell phone, Thompson might still be alive.A new leader for the team, Sgt. William James, arrives at the base. Sanborn meets him at his housing unit, where James is taking the plywood covers off his windows. When Sanborn suggests that James keep them on because of mortar shrapnel, James tells him that they won't be any good anyway if a mortar shell crashes in through the unit's roof.The next day the team responds to a report of another IED on a narrow street in the city. After the initial investigation, where they link up with the Army platoon that reported the bomb, James is dressed up in a suit similar to the one Thompson wore previously. As James approaches the bomb site, he tosses a smoke grenade, which agitates Sanborn, who can't see James to instruct him further. James also is uncommunicative with his team members, another factor that Sanborn does not appreciate. James finds an artillery shell buried under a small pile of trash. He disarms it easily, and then notices a secondary wire leading away from it. He uncovers the cable and finds it connects to a junction of six more cables. When James pulls on the junction connector, six more shells are uncovered. Another cable leads to a nearby building. James disarms the six new shells; as he does, he notices a man quickly leaving the building, presumably the bomber. James flashes one of the small detonators from one of the shells and smiles at the man, who vanishes from sight. Back at their Humvee, Sanborn tells James that he needs to communicate more during operations and not treat his duty as if it's a solo act. James brushes his teammate off. James does the same later when he and Sanborn talk while grooming themselves for another day's work in the latrine.The team is again called out for another bomb threat. This time, the bomb is in a car parked in front of a United Nations building. When the building is evacuated, James dons 
 Question: Who does the insurgents capture?
Example Output:
eldridge