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

Now, solve this: Article: Commander was my parents' cat but I knew him first. In fact, Commander was my college roommate's cat. My roommate wanted to sell Commander, but no one would buy him. I called my parents to see if they would like to adopt him. My mom had always loved cats but my dad disliked cats very much. As predicted my dad said, "No way. No cats" Fortunately for me, my dad was out of town at a math conference. So I brought Commander home. By the time he returned, both my mom and Commander had decided that Commander was going to stay. My mom said that Commander was going to live at our house for a "trial period" while we looked for a buyer. As the months went by there was absolutely no effort to sell Commander and it became clear to my dad that Commander was there to stay. Commander started sitting by my dad as he read the newspaper and slowly my dad began to like Commander---just a little bit. By the time I came home that summer, I was surprised to see my dad carrying Commander around the house. Over the years, my parents' love for Commander grew to the point where they could not imagine life without him. Once I finished college, my parents built their dream house and they named the floor plan The Commander! They worked with the architect to design the house so that it was perfectly suited both for them and for Commander. Commander died at the age of eighteen. My mom still talks about him often and misses him, and so does my dad, which proves that not even the most determined cat-hating human being in the world can resist the charms of a cat once the cat decides he is moving in to your heart.
Answer: the author's mother started looking for a buyer
Solution:
When the author's dad returned from the conference, _ .