premise: children are sitting in chairs with a music stand in the background.
hypothesis: There is a group of people sitting.
explanation_1: Children means several children, or a group, and they are sitting in both sentences.
explanation_2: Children is another way of saying a group of people
explanation_3: Children are people.
premise_logic: exists e1 x1 x2 x3 x4 x5.(n_background(x5) & with(e1,x3) & in(x3,x5) & n_stand(x3) & of(x3,x4) & n_music(x4) & in(e1,x2) & n_chair(x2) & Actor(e1,x1) & v_sit(e1) & n_child(x1))
hypothesis_logic: exists p1 x1 e1 x2 x3 x4.((x1 = x2) & of(x2,x3) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_people(x3) & n_group(x2))
premise_sim: exists e1 x1 x2 x3 x4 x5.(with(e1,x3) & v_sit(e1) & of(x3,x4) & n_stand(x3) & n_music(x4) & n_child(x1) & n_chair(x2) & n_background(x5) & in(x3,x5) & in(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists x1 e1 x2 x3 x4.(v_sit(e1) & of(x2,x3) & n_people(x3) & n_group(x2) & Actor(e1,x4) & (x3 = x4) & (x1 = x2))