premise: A parasurfer is airborne over the water.
hypothesis: Someone is parsurfing.
explanation_1: The " parasurfer " was the specific " Someone " explained in the second sentence.
premise_logic: exists s1 x1 x2.(n_water(x2) & over(s1,x2) & Theme(s1,x1) & a_airborne(s1) & n_parasurfer(x1))
hypothesis_logic: exists p1 x1.(exists x2.((x1 = x2) & n_parsurfing(x2)) & n_person(x1))
premise_sim: exists s1 x1 x2.(over(s1,x2) & n_water(x2) & n_parasurfer(x1) & a_airborne(s1) & Theme(s1,x1))
hypothesis_sim: exists x1.(n_person(x1) & exists x2.(n_parsurfing(x2) & (x1 = x2)))