A man on surfboard dives over a large wave.
The man is trying to surf.
Sentence one states the man was diving into a large wave, when sentence two states he was trying to surf.
exists s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & over(x2,x4) & n_wave(x4) & a_large(s1) & Theme(s1,x4) & n_dive(x2) & of(x2,x3) & n_surfboard(x3) & n_man(x1))
exists e1 p1 x1.(n_man(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2.(Actor(e2,x1) & v_surf(e2)))