A surfer on a blue surfboard is falling off of it as he hits a wave.
A person is surfing.
He hits a wave implies surfing, and surfer is person.
exists e1 p1 p2 s1 x1 x2.(exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_hit(e2) & n_wave(x3)) & n_male(x1) & as(e1,p2) & exists s2.(of(s2,x1) & Theme(s2,x1) & a_off(s2)) & n_thing(x1) & Topic(e1,p1) & Actor(e1,x1) & v_fall(e1) & on(x1,x2) & n_surfboard(x2) & a_blue(s1) & Theme(s1,x2) & n_surfer(x1))
exists e1 x1.(Actor(e1,x1) & v_surf(e1) & n_person(x1))