a surfer falling of his board into a wave
The man is riding a bicycle.
If he is falling off his board into a wave, then he is surfing - he can't be both surfing and riding a bicycle
exists e1 x1 x2 x3 x4.(a_topic(x1) & into(e1,x4) & n_wave(x4) & of(e1,x3) & n_board(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x2) & v_fall(e1) & (x1 = x2) & n_surfer(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2))