The second sentence just elaborates more on the skateboarder doing tricks in front of onlookers which in this case is synonym for the people standing around.


Context: A skateboarder is doing a trick in the air with his skateboard on a red ramp while people stand around looking.
Hypothesis: He is performing skating tricks with onlookers on the side.

Given this context, is the hypothesis true (Yes/No/I don't know)?