premise: A girl is in the surf.
hypothesis: A person is in the surf.
explanation_1: The person in the surf is a girl.  The second is a further descriptor of the first.
premise_logic: exists p1 x1 x2.(n_surf(x2) & in(x1,x2) & n_girl(x1))
hypothesis_logic: exists p1 x1 x2.(n_surf(x2) & in(x1,x2) & n_person(x1))
premise_sim: exists x1 x2.(n_surf(x2) & n_girl(x1) & in(x1,x2))
hypothesis_sim: exists x1 x2.(n_surf(x2) & n_person(x1) & in(x1,x2))