Two men in black wetsuits go surfing.
The men are having a competition.
The men are not necessarily having a competition.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_go(e1) & n_surfing(x3) & in(x1,x2) & n_wetsuit(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_competition(x2))