In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Example input: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Example output: Researchers did experiments on kids in order to find out _ .
Example explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.
Q: Article: An idea came to me, and I turned off the lights in the studio.In the darkness, I took off my shirt and took up the cello ; it was the first time in my life I'd felt the instrument against my bare chest.I'd never thought about that; music scholars always talk about the resonating properties of various instruments, but surely the performer's own body must have some effect on the sound.As I dug into the notes I imagined that my own chest and lungs were extensions of the sound box; I seemed to be able to change the sound by the way I sat, and by varying the muscular tightness in my upper body. After improvising for a while, I started playing, still in the darkness.I heard the music through my skin.For the first time I didn't think about how it would sound to anyone else, and slowly, joyfully, gratefully, I started to hear again.The notes sang out, first like a trickle:, then like a fountain of cool water bubbling up from a hole in the middle of a desert.After an hour or so I looked up, and in the darkness saw the outline of the cat sitting on the floor in front of me, cleaning her paws and purring loudly, I had an audience again, humble as it was. So that's what I do now with my cello.At least once a day I find time to tune it, close my eyes and listen.It's probably not going to lead to the kind of comeback I'd be thirsty for--years of playing badly have left scars on my technique--but I might eventually try giving a concert if I feel up to it. Occasionally I feel a stab of longing, and I wish I could give just one more concert on a great stage before my lights blink off, but that longing passes more quickly now.I take comfort in the fact that, unlike the way I felt before, I can enjoy playing for myself now.I feel relaxed and expansive when I play, as if I could stretch out my arms and reach from one end of the apartment to the other.A feeling of completeness and dignity surrounds me and lifts me up.
Answer: experience the effect of his body on the musical sound
A:
The writer put the cello against his bare chest to _ .