A child at breakfast is crying.
A person at breakfast is crying.
A child is a person
exists e1 x1 x2.(Actor(e1,x1) & v_cry(e1) & at(x1,x2) & n_breakfast(x2) & n_child(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_cry(e1) & at(x1,x2) & n_breakfast(x2) & n_person(x1))