person skateboarding on street wearing equipment
Man in competition.
A person can be a man or a woman. Just because a person wearing equipment is skateboarding doesn't mean the person is in competition.
exists e2 e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_equipment(x3) & Actor(e2,x3) & v_wear(e2) & of(x3,x4) & n_street(x4) & Actor(e1,x2) & v_skateboard(e1) & (x1 = x2) & n_person(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_competition(x2) & n_man(x1))