Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Example Input: Sr-Vagsy is a former municipality in Sogn og Fjordane county in Norway.
Example Output: In which country would you find Sør-Vågsøy?

Example Input: In plant, primary transcripts (pri-miRNAs) transcribed from miRNA genes by RNA polymerase II are first processed into stem-loop pre-miRNAs and further chopped into 21nt long miRNAs by RNase III-like enzyme DCL1. SERRATE (SE) protein is an essential component for miRNA processing by assisting DCL1 for accurate cleavage. Here we report the crystal structure of Arabidopsis SE core (residues 194-543) at 2.7A. SE core adopts the 'walking man-like' topology with N-terminal helices, C-terminal non-canonical zinc-finger domain and novel Middle domain resembling the leading leg, the lagging leg and the body, respectively. Pull-down assay shows that SE core provides the platform for HYL1 and DCL1 binding, whereas in vitro RNA binding and in vivo mutant rescue experiments suggest that the non-canonical zinc-finger domain coupled with C-terminal tail binds miRNA precursors. SE presumably works as a scaffold-like protein capable of binding both protein and RNA to guide the positioning of miRNA precursor toward DCL1 catalytic site within miRNA processing machinery in plant.
Example Output: Which polymerase transcribes pri-miRNAs?

Example Input: A star usually is someone who has become famous in sports, film, or pop music, someone like singer Michael Jackson. In the middle nineteen eighties, Michael Jackson successfully made a famous record, which quickly became the most popular recording in the history of music. This made Michael Jackson a bright star. One of the famous sports bright stars in the United States is Mohammed Ali. When he was a young man, he won a gold medal in the Olympic Games as a boxer. Then, he won first place in the world heavy weight boxing match. Before long, he was known as one of the greatest and most famous boxers in sports history. Everyone knows his name. Like the stars in the sky, a bright star will lose his brightness as time passes. He is loved by millions of people today, but will be forgotten tomorrow.
Example Output:
What does this passage mainly talk about?