premise: A girl swings high in the air.
hypothesis: A girl is on a swing
explanation_1: A girl swings high in the air means the girl is on a swing.
explanation_2: If the girl swings, naturally she is on a swing.
explanation_3: Swings high is a rephrasing of is on a swing.
premise_logic: exists e1 s1 x1 x2.(n_air(x2) & in(e1,x2) & a_high(s1) & Manner(e1,s1) & Actor(e1,x1) & v_swing(e1) & n_girl(x1))
hypothesis_logic: exists p1 x1.(exists x2.(on(x1,x2) & n_swing(x2)) & n_girl(x1))