A crowd of people in a parade.
People are trying to leave the parade.
Just because there is a crowd of people in a parade does not mean they are trying to leave.
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_parade(x3) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists e1 p1 x1 x2.(n_parade(x2) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_leave(e2)) & n_people(x1))