A doctor is watching as a operations is occurring.
A doctor watches an operation.
operation is held under the monitor of doctor
exists e1 p1 x1.(exists e2 x2.(Actor(e2,x2) & v_occur(e2) & n_operation(x2)) & as(e1,p1) & Actor(e1,x1) & v_watch(e1) & n_doctor(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_operation(x2) & n_doctor(x1))