A man jumps over a wave while riding a surfboard.
A man is in a surfing competition
Just because a man jumps over a wave while riding a surfboard doesn't imply a surfing competition.
exists e1 e2 x1 x2 x3.(while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & n_surfboard(x3) & over(e1,x2) & n_wave(x2) & Actor(e1,x1) & v_jump(e1) & n_man(x1))
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_competition(x2) & of(x2,x3) & n_surfing(x3)) & n_man(x1))