A child seated at the dentists.
A kid is at the dentist.
Dentist looks at a kid
exists e1 x1 x2.(n_dentist(x2) & at(e1,x2) & Theme(e1,x1) & v_seat(e1) & n_child(x1))
exists p1 x1 x2.(n_dentist(x2) & at(x1,x2) & n_kid(x1))