A man is pulled behind a boat on a knee board while another doing the same begins to fall.
Both men will eventually fall off the board.
Just because one man begins to fall does not mean that both men will eventually fall.
exists e1 p1 x1 x2 x3 x4 x7.(n_same(x7) & exists e3 e2 p2 x5 x6.(Topic(e3,p2) & Actor(e3,x5) & v_begin(e3) & exists e4.(Actor(e4,x5) & v_fall(e4)) & Theme(e2,x7) & Actor(e2,x6) & v_do(e2) & (x5 = x6) & n_thing(x5)) & while(e1,p1) & behind(e1,x2) & on(x2,x3) & n_board(x3) & of(x3,x4) & n_knee(x4) & n_boat(x2) & Theme(e1,x1) & v_pull(e1) & n_man(x1))
exists e1 s1 s2 x1 x2.(n_board(x2) & n_man(x1) & a_eventually(s2) & Manner(e1,s2) & Time(e1,x2) & a_off(s1) & Manner(e1,s1) & Actor(e1,x1) & v_fall(e1))