Two surgeons performing a surgery.
A doctor makes an incision with a scalpal.
The surgeons could be doing a laser procedure, no incision required.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_surgery(x3) & (x1 = x2) & n_surgeon(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & with(x2,x3) & n_scalpal(x3) & n_incision(x2) & n_doctor(x1))