sentence_A: A man on a yellow sport bike is doing a wheelie and a friend on a black bike is catching up
sentence_B: A biker on a yellow sport bike is doing a wheelie and a friend on a black bike is catching up
sentence_A_original: a man on a yellow sport bike does a wheelie as his friend on a black bike catches up
sentence_B_original: a man on a yellow sport bike does a wheelie as his friend on a black bike catches up