Two men in military uniform, a man in a tuxedo, a man in a suit, and a woman in a black cocktail dress is a group of people.


Context: Two men in military uniform, a man in a tuxedo, a man in a suit, and a woman in a black cocktail dress are holding sheets of paper and singing.
Hypothesis: A group of people are signing.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?