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: Ian Lafferty (Josh Zuckerman) is an 18-year-old recent high school graduate. He searches for a girl online making it seem as if he is attractive and strong, although he's sweet and unassuming. He soon meets "Ms. Tasty" (Katrina Bowden) and agrees to meet her in person. She lives in Knoxville, Tennessee, while he lives in Chicago, Illinois. With his best friends Lance Nesbitt (Clark Duke) and Felicia Alpine (Amanda Crew), he goes to Knoxville in a 1969 Pontiac GTO Judge borrowed without permission from Ian's arrogant homophobic older brother Rex (James Marsden). On the way to Knoxville, they come across a hitchhiker (David Koechner), as the radiator in the Judge overheats. They attempt urinating in the radiator, which only works briefly as they try to leave the hitchhiker in the dust. The hitchhiker, frustrated at Ian's lack of concern for his well being, leaves, but not before urinating on the car window. As Ian and Felicia wander to find help, Lance is waiting with the car as Ezekiel (Seth Green) happens to pass by in his horse-drawn buggy. Ezekiel and his Amish buddies repair the car while they join a Rumspringa party where Fall Out Boy are playing a concert, and at which Lance meets an attractive Amish girl, Mary (Alice Greczyn). The three promise to come again on the way back to do some work in return for fixing the car. They go to jail due to Ian throwing a tire iron into a state trooper car, due to his increasing frustration after trying to put a possum he hit out of its misery, and are released after Mary pays the bail. Upon arriving at Knoxville, they find a hotel that sports a wide variety of role playing rooms. Rex, who has discovered the Judge gone missing, arrives angrily and insists that they go back and that Ian cannot visit Ms. Tasty. After Ian pretends to be gay, Rex allows him to see Ms. Tasty, hoping this encounter will change Ian's mind. Ian finally meets Ms. Tasty. However, when he tells her about Felicia, her seduction for Ian to take off his clothes becomes a threat as her psychotic boyfriend Bobby Jo (Dave Sheridan) puts a gun to Ian's head. It becomes apparent that they work at a chop shop and attempt to steal the Judge. Lance and Mary arrive after having sex, as well as a redneck named Rick (Michael Cudlitz) whose girlfriend Brandy (Andrea Anders) slept with Lance earlier. Felicia, however, is hiding in the car when Bobby Jo tries to steal it. Soon, a green car that has been continuously drag-racing with the Judge throughout the movie arrives. Ian manages to save Felicia, who then is able to run off and report to the police. Ms. Tasty tries to escape, but is stopped by the green car, whose drivers turn out to be Andy and Randy (Charlie McDermott and Mark L. Young), two dim-witted self-declared "womanizers" from Ian's school, who Ms. Tasty tried to manipulate into giving her the car. Bobby Jo is treated after being shot by Ian in self-defense. Felicia tells the police about the chop shop location and the couple is arrested. Upon finding out that if Mary leaves the Amish community, she will be shunned, Lance refuses to come back home and stays behind to marry Mary, while Ian and Felicia realize their love for each other. Ian and Felicia drive to a tree where Ian throws his shoes up into the tree. A few weeks later Ian is Felicia's date to her cousin's wedding. At Thanksgiving dinner, Rex tells his family that he's gay. On New Year's Eve Ian and Felicia finally have sex, in Ian's basement under a blanket on the sofa. In the final frame of the film, a picture is shown of Lance and Mary getting married, accompanied by Ian. Lance is shown sporting a beard exactly like Ezekiel's. During the credits, a short scene is shown of Ezekiel and Fall Out Boy arguing over the fact that the 
 Question: Who plays Ian Lafferty?
Example Output: josh zuckerman

Example Input: Context: The movie opens with the Barden Bellas about to perform at the ICCA championships. One of them, Chloe (Brittany Snow) is running late to the start of the performance. When she arrives she is reprimanded by the older Bellas. As they are about to perform, Aubrey (Anna Camp) tries to assure them she'll do a good job, but is shot down. The group sings 'The Sign'.. and all is going well, until the very end when Aubrey has a solo, and projectile vomits all over the stage and front rows of the audience.Cut to the start of a new year at Barden University, and freshman Beca (Anna Kendrick) is arriving by taxi. While she is receiving directions and her Rape Whistle, a car passes her by, and another student, Jesse (Skylar Austin) is singing along to the radio, and catches her attention.Beca finds her new dorm room, and meets her roommate Kimmy-Jin, who is hostile and unfriendly. Beca's dad, a professor at Barden then arrives, and asks her how she got there. It is revealed that Beca's parents have split up as she refers to her dad's new wife as her 'step monster', and seems very reluctant to be attending College. Beca's dad tries to encourage her to enjoy it, but Beca escapes to the Activities fair.In another dorm room, Jesse is meeting his roommate Benji (Ben Platt), who is into Star Wars and magic.At the Activities fair, we are introduced to the Trebles - one of the Campus singing groups, all male, who are talented and have a high opinion of themselves, especially Bumper (Adam Devine) the lead singer. Jesse and Benji approach the Trebles, as Benji is desperate to join, but Bumper is not impressed with his enthusiasm.Across the campus, the Bellas are now down to just 2 members - Aubrey and Chloe, who are trying to recruit new ones. Due to their disastrous performance at the last Championships, they are not having much luck, and are even ridiculed by 'Baloney Barb' who has tried out for them previously. They are then approached by Fat Amy (Rebel Wilson), an outgoing and quirky student from Tasmania who doesn't hesitate to demonstrate her singing and dancing abilities. They then meet Beca, who quickly rebuffs their offer to audition, saying it is lame, which immediately puts Aubrey offside.Instead of being interested in joining any of the singing groups, Beca has much more of an interest in remixing music on her laptop. She gets a job at the campus radio station, and much to her dismay, so does Jesse.Her dad pays her a visit in her dorm, and gives her an ultimatum - if she makes an effort and joins a group at College , but still doesn't like it by the end of the year, she can quit and follow her true dream of becoming a DJ, and he will help her... but he wants her to really make an effort.As Beca goes into the communal showers singing to herself, Chloe happens to be in the showers as well, and confronts Beca in her shower stall , insisting that she try out for the Bellas. Although Beca is mortified, she sings along with Chloe to 'Titanium'.Finally the auditions are on, and Jesse, Benji and Fat Amy are among the hopefuls trying out, auditioning to 'Since you've been gone'. Beca comes late, and hasn't prepared the audition song, but auditions with 'Cups (miss me when I'm gone)', and Chloe and Jesse are impressed, while Aubrey is unsure. We then see the initiation of the new Bellas including Beca, Fat Amy, Stacie (Alexis Knapp), Cynthia-Rose (Esther Dean) and the very softly spoken Lilly (Hana Mae Lee). They all swear an oath and drink the 'blood of the Bellas who came before them' (wine). Cut to the initiation of the new Trebles.. Jesse has made it, but Benji has not. That night, there is Aca-initiation where all the groups 
 Question: Who provides an impromptu back-up of one of her favorite songs into the "traditional" song?
Example Output: chloe

Example Input: Context: Human selenoprotein P (HSelP) is unique protein that contains 10 selenocysteines encoded by 10 inframe UGA, which typically function as stop codon. The function of HSelP remains unclear, in part due to the inability to express it by gene recombinant technique. This study is to investigate expression and purification of recombinant HSelP in prokaryotic expression system, and its activity to induce apoptosis in vitro. The shorter HSelP isoform was cloned. After the selenocysteine (SeCys) at 40th position from N terminus of the HSelP shorter isoform was mutated into cysteine by PCR, it was expressed in E. coli. The expressed product was purified with DEAE column and identified by Western blot. Subsequently, its function on induction of mitochondrial apoptotic activity was studied. The mutant HSelP shorter isoform expressed in prokaryotic system was purified by DEAE column to 90% homogeneity. The purified product, HSelP280m, induced the opening of mitochondrial permeability transition pore (PTP) and decreased the transmembrane potential in a dose-dependent manner. These events could be abolished by PTP specific inhibitors. HSelP280m can induce the opening of mitochondrial PTP, which provides a basis for investigating the structure and function of recombinant HSelP. 
 Question: Which is the human selenoprotein that contains several Se-Cys residues?
Example Output:
selenoprotein p