A crying child and people walking in a park.
The child is crying because it is lost in the park surrounded by strangers.
A crying child can be crying for many reasons, you cannot automatically assume the child is lost. He might have simply dropped the top of his ice cream on the ground, or scraped his knee a bit.
exists e2 e1 s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & in(e2,x4) & n_park(x4) & Actor(e2,x3) & v_walk(e2) & (x2 = x3) & n_people(x2) & subset_of(x1,s1) & n_child(x1) & Actor(e1,x1) & v_cry(e1))
exists e1 p1 x1 x2.(n_park(x2) & n_thing(x1) & n_child(x1) & exists e3 e2 x3 x4.(in(e2,x2) & Actor(e3,x4) & n_stranger(x4) & Theme(e3,x3) & v_surround(e3) & (x2 = x3) & Theme(e2,x1) & v_lose(e2)) & because(e1,p1) & Actor(e1,x1) & v_cry(e1))