premise: A crowd watching a skateboarder.
hypothesis: A person is skateboarding
explanation_1: A skateboarder is a  person
explanation_2: Skateboarder is a person.
explanation_3: One must be skateboarding to be a skateboarder.
premise_logic: exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_skateboarder(x3) & (x1 = x2) & n_crowd(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_skateboard(e1) & n_person(x1))
premise_sim: exists e1 x1 x2 x3.(v_watch(e1) & n_skateboarder(x3) & n_crowd(x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))
hypothesis_sim: exists e1 x1.(v_skateboard(e1) & n_person(x1) & Actor(e1,x1))