Two surgeons performing a surgery.
Two surgeons are men.
Surgeons could be women, not men.
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 p1 x1.(exists x2.((x1 = x2) & n_man(x2)) & n_surgeon(x1) & card_eq_2(x1))