A surfer rides on a very rough wave.
A surfer is riding a wave to impress his friends.
WHo said he is trying to impress others with his surfing
exists e1 s1 x1 x2.(on(e1,x2) & n_wave(x2) & a_rough(s1) & Theme(s1,x2) & r_very(x2) & Actor(e1,x1) & v_ride(e1) & n_surfer(x1))
exists e1 p1 x1 x2 x3 x4.(Topic(e1,p1) & exists e2.(Theme(e2,x4) & Actor(e2,x1) & v_impress(e2)) & n_friend(x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_wave(x3) & n_surfer(x2) & n_surfer(x1))