Please choose the correct ending to complete the given sentence: Ballet: People practice ballet in a studio alone and in couples. Then, a boy and a girl dance ballet, then a man enter and dance with the girl. after

Ending1: , a man in a black robe enters and dance in the room after the dancer. Ending2: , a musician enters and dances with two other musicians. Ending3: , several couples dance ballet while other people observe. Ending4: , the boy fall behind right then the girl run on the beach.

Answer format: ending1/ending2/ending3/ending4