premise: An surfer airborne over a wave.
hypothesis: A surfer is in the ocean.
explanation_1: Although the surfer is over a wave that wave may not be in the ocean.
premise_logic: exists x1 x2 x3.(a_topic(x1) & over(x1,x3) & n_wave(x3) & n_airborne(x1) & of(x1,x2) & n_surfer(x2))
hypothesis_logic: exists p1 x1 x2.(n_ocean(x2) & in(x1,x2) & n_surfer(x1))
premise_sim: exists x1 x2 x3.(over(x1,x3) & of(x1,x2) & n_wave(x3) & n_surfer(x2) & n_airborne(x1) & a_topic(x1))
hypothesis_sim: exists x1 x2.(n_surfer(x1) & n_ocean(x2) & in(x1,x2))