Please choose the correct ending to complete the given sentence: Tai chi: Two men are posing in a photo for martial arts. a group

Ending1: of athletes watch on the sidelines as a man takes a stance at the front of the arena's court. Ending2: of young men are standing around small tape measure, measuring. Ending3: of people walk past a stadium. Ending4: is gathered inside a room, shown in various martial arts poses.

Answer format: ending1/ending2/ending3/ending4