premise: An accident involving a green Sudan and a gray van.
hypothesis: Two cars were in an accident.
explanation_1: the accident involved a sedan & a van. those two vehicles collided.
explanation_2: Green Sudan and a gray van equals two cars.
explanation_3: Two cars a green Sudan and a gray van were in an accident.
premise_logic: exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & involve(x1,x2) & subset_of(x4,x2) & n_van(x4) & a_gray(s2) & Theme(s2,x4) & subset_of(x3,x2) & ne_geo_sudan(x3) & a_green(s1) & Theme(s1,x3) & n_accident(x1))
hypothesis_logic: exists p1 x1.(exists x2.(in(x1,x2) & n_accident(x2)) & n_car(x1) & card_eq_2(x1))
premise_sim: exists s1 s2 x1 x2 x3 x4.(subset_of(x4,x2) & subset_of(x3,x2) & ne_geo_sudan(x3) & n_van(x4) & n_accident(x1) & involve(x1,x2) & a_topic(x1) & a_green(s1) & a_gray(s2) & Theme(s2,x4) & Theme(s1,x3))
hypothesis_sim: exists x1.(n_car(x1) & exists x2.(n_accident(x2) & in(x1,x2)) & card_eq_2(x1))