One man is jumping into the water, while the other is watching.
Two girls are jumping in the water
He refers to two men, not two girls. One man jumps in the water, not two girls jumping in the water.
exists e1 p1 x1 x2 x3.(n_other(x3) & n_water(x2) & exists e2.(Actor(e2,x3) & v_watch(e2)) & while(e1,p1) & into(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_man(x1) & card_eq_1(x1))
exists e1 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_girl(x1) & card_eq_2(x1))