premise: A silhouette at the bottom of an escalator.
hypothesis: The group of people are running in a race.
explanation_1: Being at the bottom of an escalator, one cannot run a race.
explanation_2: It can't be a group if it is a silhouette.
explanation_3: A silhouette is not a group of people.
premise_logic: exists x1 x2 x3.(n_bottom(x2) & a_topic(x1) & at(x1,x2) & of(x2,x3) & n_escalator(x3) & n_silhouette(x1))
hypothesis_logic: exists e1 x1 x2 x3.(n_group(x1) & in(e1,x3) & n_race(x3) & Actor(e1,x1) & v_run(e1) & of(x1,x2) & n_people(x2))