A child seated at the dentists.
A child sits in a movie theatre.
The child can not be at the dentists and the movie theatre at the same time.
exists e1 x1 x2.(n_dentist(x2) & at(e1,x2) & Theme(e1,x1) & v_seat(e1) & n_child(x1))
exists e1 x1 x2 x3.(in(e1,x2) & n_theatre(x2) & of(x2,x3) & n_movie(x3) & Actor(e1,x1) & v_sit(e1) & n_child(x1))