two surfers are riding waves in open water.
Two people are competing in a surf competition.
It cannot be inferred that the surfers are competing in a surf competition.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_water(x3) & a_open(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wave(x2) & n_surfer(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_competition(x2) & a_surf(s1) & Theme(s1,x2) & Actor(e1,x1) & v_compete(e1) & n_people(x1) & card_eq_2(x1))