Which sentence states a fact?
A: Fifteen days is a long time to celebrate a holiday.
B: People in China celebrate their New Year for fifteen days.
The second sentence states a fact.
People in China celebrate their New Year for fifteen days.
It can be proved by looking up information about the Chinese New Year.
The first sentence states an opinion.
Fifteen days is a long time to celebrate a holiday.
Long time shows what a person believes, thinks, or feels. Another person might have a different opinion about what is a long time.