In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

[EX Q]: Alex watched cartoons and had a snack after school. 
Question: Why did Alex do this?
[EX A]: relax

[EX Q]: Gregory Lunn and Mrs Juno are in love, having met during a sea voyage. On a sofa in a hotel where both are staying, they discuss their feelings. They are both already married, so they decide they must part, but are unable to do so. They then recognise the voices of their respective spouses, apparently staying together at the same hotel. They leave in confusion. Mrs Lunn and Mr. Sibthorpe Juno enter and sit together on the same sofa that the other pair have just left. Sibthorpe says he is in love with Mrs Lunn, but she says she is only mildly attracted to him. Sibthorpe wants her to either accept or reject him outright. Her willingness to merely have an affair disturbs him. Gregory and Mrs. Juno re-enter and both couples reveal their conflicting feelings. They all find they have differet views about the situation. Gregory feels that there is a morally unacceptable contradiction between his desires and his honour. Sibthorpe, in contrast, says that such mixed feelings are fine, as long as one acts according to moral principles. Mrs Lunn believes that moral rules are silly. She thinks that as long as everyone gets the best they can out of the situation, that's all that matters. She's quite happy for Mrs Juno to have her husband for a while, and to return to compliment by enjoying her affair with Sibthorpe. Sibthorpe says that this is justifying polygamy. Mrs Lunn says she intends to continue the affair with Sibthorpe, because she enjoys it. Mrs Juno likewise refuses to stop seeing Gregory, because she enjoys being adored by him. So they agree to leave things as they are. 
Question: How does Gregory feel about the situation?
[EX A]: He is extremely conflicted.

[EX Q]: The film opens with violinist Roberta Guaspari having been deserted by her US Navy husband and feeling devastated, almost suicidal. Encouraged by her mother, she attempts to rebuild her life and a friend from student days recommends her to the head teacher of a school in the tough New York City area of East Harlem. Despite a degree in music education, she has little experience in actual music teaching, but she's taken on as a substitute violin teacher. With a combination of toughness and determination, she inspires a group of kids, and their initially skeptical parents. The program slowly develops and attracts publicity. Ten years later, the string program is still running successfully at three schools, but suddenly the school budget is cut and Roberta is out of a job. Determined to fight the cuts, she enlists the support of former pupils, parents and teachers and plans a grand fund-raising concert, 'Fiddlefest', to raise money so that the program can continue. But with a few weeks to go and all participants furiously rehearsing, they lose the venue. Fortunately, the husband of a publicist friend is a violinist in the Guarneri Quartet, and he enlists the support of other well-known musicians, including Isaac Stern and Itzhak Perlman. They arrange for the concert to be mounted at Carnegie Hall. Other famous musicians, including Mark O'Connor, Michael Tree, Charles Veal Jr., Arnold Steinhardt, Karen Briggs, Sandra Park, Diane Monroe, and Joshua Bell, join in the performance, which is a resounding success. The film's end credits declare that the Opus 118 program is still running successfully. They also report that the school's funding was restored during the making of the film. 
Question: What instrument does Roberta Guaspari play?
[EX A]:
The violin.