Where are people likely to sing?
Options:
- apartment
- supermarket
- train station
- opera
- conference Let's give stream of consciousness first:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Opera is an ancient musical art form including theatrical work. Opera includes singing. People usually sing at Opera.
Therefore, the answer is opera.