The doctors are involved in an operation.
The doctors are eating a gallbladder.
Doctors would never be eating while involved in an operation, let alone a gallbladder.
exists e1 x1 x2.(n_doctor(x1) & in(e1,x2) & n_operation(x2) & Theme(e1,x1) & v_involve(e1))
exists e1 x1 x2.(n_doctor(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_gallbladder(x2))