A man catching a wave on a surfboard being observed or photographed by others from the shore.
A man is competing in a surfing contest.
A man catching a wave is not necessarily a man who is competing in a surfing contest.
exists e1 x1 x2 x3 x4 x5 x10.(n_shore(x5) & n_person(x10) & n_person(x5) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_catch(e1) & from(x3,x5) & on(x3,x4) & (exists e2 x6 x7.(Actor(e2,x7) & -(x7 = x5) & n_person(x7) & Theme(e2,x6) & v_observe(e2) & (x4 = x6)) | exists e3 x8 x9.(Actor(e3,x9) & -(x9 = x10) & n_person(x9) & Theme(e3,x8) & v_photograph(e3) & (x4 = x8))) & n_surfboard(x4) & n_wave(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(in(e1,x2) & n_contest(x2) & of(x2,x3) & n_surfing(x3) & Actor(e1,x1) & v_compete(e1) & n_man(x1))