premise: An elderly woman in a crowd pushing a wheelchair.
hypothesis: There is a young man in a crowd.
explanation_1: The subject is either a young man or elderly woman.
explanation_2: Elderly and young are opposites.
explanation_3: An elderly woman can not be a young man.
premise_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_push(e1) & n_wheelchair(x4) & (x2 = x3) & n_crowd(x2) & n_woman(x1) & a_elderly(s1) & Theme(s1,x1))
hypothesis_logic: exists p1 x1 s1 x2 x3.((x1 = x2) & in(x2,x3) & n_crowd(x3) & n_man(x2) & a_young(s1) & Theme(s1,x2))