premise: Firefighters fighting a fire.
hypothesis: There is a fire.
explanation_1: Firefighters can only be fighting a fire is there is one.
premise_logic: exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_fight(e1) & n_fire(x3) & (x1 = x2) & n_firefighter(x1))
hypothesis_logic: exists p1 x1 x2.((x1 = x2) & n_fire(x2))
premise_sim: exists e1 x1 x2 x3.(v_fight(e1) & n_firefighter(x1) & n_fire(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))
hypothesis_sim: exists x1 x2.(n_fire(x2) & (x1 = x2))