premise: The surfer is in the wave.
hypothesis: a surfer riding a big wave at a competition
explanation_1: The surfer in the wave may not be riding it, attending a competition, and the wave itself does not have to be big.
premise_logic: exists p1 x1 x2.(n_wave(x2) & n_surfer(x1) & in(x1,x2))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x4) & n_competition(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_wave(x3) & a_big(s1) & Theme(s1,x3) & (x1 = x2) & n_surfer(x1))
premise_sim: exists x1 x2.(n_wave(x2) & n_surfer(x1) & in(x1,x2))
hypothesis_sim: exists e1 s1 x1 x2 x3 x4.(v_ride(e1) & n_wave(x3) & n_surfer(x1) & n_competition(x4) & at(e1,x4) & a_topic(x1) & a_big(s1) & Theme(s1,x3) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))