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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.

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
Solution: Researchers did experiments on kids in order to find out _ .
Why? It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

New input: Article: When Marilynne Robinson published her first novel, Housekeeping, in 1980, she was unknown in the literary world. But an early review in The New York Times ensured that the book would be noticed. "It's as if, in writing it, she broke through the ordinary human condition with all its dissatisfactions, and achieved a kind of transfiguration ," wrote Anatole Broyard, with an enthusiasm and amazement that was shared by many critics and readers. The book became a classic, and Robinson was recognized as one of the outstanding American writers of our time. Yet it would be more than twenty years before she wrote another novel. During the period, Robinson devoted herself to writing nonfiction. Her essays and book reviews appeared in Harper's and The New York Times Book Review, and in 1989 she published Mother Country: Britain, the Welfare State, and Nuclear Pollution, criticizing severely the environmental and public health dangers caused by the Sellafield nuclear reprocessing plant in England--and the political and moral corruption . In 1998, Robinson published a collection of her critical and theological writings, The Death of Adam: Essays on Modern Thought, which featured reassessments of such figures as Charles Darwin, John Calvin, and Friedrich Nietzsche. Aside from a single short story--"Connie Bronson," published in The Paris Review in 1986--it wasn't until 2004 that she returned to fiction with the novel Gilead, which won the National Book Critics Circle Award and the Pulitzer Prize. Her third novel, Home, came out this fall. Her novels could be described as celebrations of the human--the characters in them are unforgettable creations. Housekeeping is the story of Ruth and her sister Lucille, who are cared for by their eccentric Aunt Sylvie after their mother commits suicide. Robinson writes a lot about how each of the three is changed by their new life together. Gilead is an even more close exploration of personality: the book centres on John Ames, a seventy-seven-year-old pastor who is writing an account of his life and his family history to leave to his young son after he dies. Home borrows characters from Gilead but centers on Ames's friend Reverend Robert Boughton and his troubled son Jack. Robinson returned to the same territory as Gilead because, she said, "after I write a novel or a story, I miss the characters--I feel like losing some close friends."
Answer: in 2004
Solution:
Robinson's second novel came out _ .