The fact that three girls in gold' Native American' costumes dance on a football field while several young men in dark blue uniforms play drums behind them does not mean that they perform at the halftime of a football game.


Context: Three girls in gold' Native American' costumes dance on a football field while several young men in dark blue uniforms play drums behind them.
Hypothesis: Some people perform at the halftime of a football game.

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