premise: The boys are playing with Legos.
hypothesis: Boys are playing.
explanation_1: "Boys are playing" describes what the boys are doing with the Legos.
explanation_2: Boys are playing in both sentences. The only difference is that Sentence 1 specifies they are playing with Legos.
explanation_3: The boys are playing legos.
premise_logic: exists e1 x1 x2.(ne_org_legos(x2) & n_boy(x1) & with(e1,x2) & Actor(e1,x1) & v_play(e1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_boy(x1))
premise_sim: exists e1 x1 x2.(with(e1,x2) & v_play(e1) & ne_org_legos(x2) & n_boy(x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1.(v_play(e1) & n_boy(x1) & Actor(e1,x1))