premise: A lady sitting on a bench with a book on her lap with a boy and girl on either side of her.
hypothesis: An adult and two children are on a rollercoaster.
explanation_1: Either, the people are on a bench or on a rollercoaster, not both.
explanation_2: Two children could be two boys or two girls instead of a boy and a girl.  If a lady, a boy and a girl are sitting on a bench they can not be on a rollercoaster.
explanation_3: A bench is not the same as a rollercoaster.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & all x9.(n_side(x9) -> (with(e1,x6) & on(x6,x9) & of(x9,x1))) & n_female(x1) & n_female(x1) & n_girl(x8) & n_boy(x7) & subset_of(x8,x6) & subset_of(x7,x6) & with(e1,x4) & on(x4,x5) & n_lap(x5) & of(x5,x1) & n_book(x4) & on(e1,x3) & n_bench(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_lady(x1))
hypothesis_logic: exists p1 x1 x2 x3.(exists x4.(on(x1,x4) & n_rollercoaster(x4)) & n_child(x3) & card_eq_2(x3) & n_adult(x2) & subset_of(x3,x1) & subset_of(x2,x1))
premise_sim: exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(with(e1,x4) & v_sit(e1) & subset_of(x8,x6) & subset_of(x7,x6) & on(x4,x5) & on(e1,x3) & of(x5,x1) & n_lap(x5) & n_lady(x1) & n_girl(x8) & n_female(x1) & n_boy(x7) & n_book(x4) & n_bench(x3) & all x9.((with(e1,x6) | -n_side(x9)) & (on(x6,x9) | -n_side(x9)) & (of(x9,x1) | -n_side(x9))) & a_topic(x1) & Actor(e1,x2) & (x1 = x2))
hypothesis_sim: exists x1 x2 x3.(subset_of(x3,x1) & subset_of(x2,x1) & n_child(x3) & n_adult(x2) & exists x4.(on(x1,x4) & n_rollercoaster(x4)) & card_eq_2(x3))