A girl in a blue dress walks through a crowd of people.
A girl has become lost in the crowd.
It can't be assumed that the girl is lost because she is in a crowd.
exists e1 s1 x1 x2 x3 x4.(through(e1,x3) & of(x3,x4) & n_people(x4) & n_crowd(x3) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_dress(x2) & a_blue(s1) & Theme(s1,x2) & n_girl(x1))
exists e1 p1 x1 x2.(n_crowd(x2) & exists e2.(in(e2,x2) & Theme(e2,x1) & v_lose(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_become(e1) & n_girl(x1))