premise: They are sitting on the edge of a fountain
hypothesis: Persons are seated on the fountain's edge.
explanation_1: They are persons and person are they.
explanation_2: People may sit on the fountain edge.
explanation_3: They are people and sitting is the same as seated.
premise_logic: exists e1 x1 x2.(n_edge(x2) & on(e1,x2) & of(x2,x1) & n_fountain(x1) & Actor(e1,x1) & v_sit(e1) & n_thing(x1))
hypothesis_logic: exists e1 x1 x2 x3.(n_edge(x3) & of(x3,x2) & n_fountain(x2) & on(e1,x3) & Theme(e1,x1) & v_seat(e1) & n_person(x1))