Three people sit on a couch, two with drinks in their hand, while several other people mill around in the background does not indicate that they are celebrating a birthday by partying.


Context: Three people sit on a couch, two with drinks in their hand, while several other people mill around in the background.
Hypothesis: A group of people are celebrating a birthday by partying.

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