premise: A large crowd is standing around the start line.
hypothesis: People are crossing a finish line
explanation_1: One scene is the start of a race where people are standing, and the other scene is the end of a race where they are crossing a finish line. You can't do both, at the same time.
explanation_2: The people cannot be at the start line and finish line at the same time. Also, if they are standing around, they are not crossing the finish line.
explanation_3: One is at the start, the other is at the finish.
premise_logic: exists e1 s1 x1 x2 x3.(n_line(x2) & of(x2,x3) & n_start(x3) & around(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_crowd(x1) & a_large(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & n_line(x2) & of(x2,x3) & n_finish(x3) & n_people(x1))
premise_sim: exists e1 s1 x1 x2 x3.(v_stand(e1) & of(x2,x3) & n_start(x3) & n_line(x2) & n_crowd(x1) & around(e1,x2) & a_large(s1) & Theme(s1,x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3.(v_cross(e1) & of(x2,x3) & n_people(x1) & n_line(x2) & n_finish(x3) & Theme(e1,x2) & Actor(e1,x1))