Given the task definition, example input & output, solve the new input case.
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: 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
Output: Researchers did experiments on kids in order to find out _ .
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 case for you: Article: We are naturally drawn to friends and colleagues with familiar voices, scientists have found.People prefer those who have a similar accent,intonation and tone of voice to themselves , they discovered. Previous research has focused on how masculine or feminine a voice sounds.Men with deeper voices and women with slightly higher voices were thought to sound more attractive,because they suggest a bigger or a smaller body. But the new study,published by a linguistics expert in Canada,suggests there is a more complex mechanism at play.Dr Molly Babel, from the University of British Columbia in Canada, said,"The voice is an amazingly flexible tool that we use to construct our identity.Very few things in our voices are changeless,so we felt that our preferences had to be about more than a person's shape and size.'' She recorded 30 volunteers' voices and asked each to rate the others' attractiveness on a scale of one to nine.Each participant was from western America,with similar accents.The people we assessed were all in the same dialect group,but they showed that dialect to different degrees. "We seem to like people who sound like we sound,we like people who fit within what we know,"Dr Babel said.She also found that breathy voices in women-typified by the famous American actress Marilyn Monroe-were seen as more attractive. The breathy tone,caused by younger and thinner vocal cords ,implied youthfulness and health A creaky voice,suggesting a person has a cold,is tired or smokes,was seen as unattractive.The participants preferred men who spoke with a shorter average word length and deeper voices. The linguist,whose work is published in the journal PLOS One,said,"Once you're outside of a certain range of familiarity,novel and exotic sounding voices might become more attractive.We also have to keep in mind we find some accents more preferable than others because of social fixed ideas."
Answer: the same social groups
Output:
In terms of voice preferences,the new findings highlight _ .