premise: Two people stand before an ambulance.
hypothesis: Two people are in front of an ambulance
explanation_1: in front is a rephrasing of stand before.
premise_logic: exists e1 x1 x2.(before(e1,x2) & n_ambulance(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & card_eq_2(x1))
hypothesis_logic: exists p1 x1.(exists x2 x3.(in(x1,x2) & of(x2,x3) & n_ambulance(x3) & n_front(x2)) & n_people(x1) & card_eq_2(x1))
premise_sim: exists e1 x1 x2.(v_stand(e1) & n_people(x1) & n_ambulance(x2) & card_eq_2(x1) & before(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_people(x1) & exists x2 x3.(of(x2,x3) & n_front(x2) & n_ambulance(x3) & in(x1,x2)) & card_eq_2(x1))