Two men shave their faces while a woman watches.
woman are shaving.
Men and woman implies different gender and different number of people.
exists e1 p1 x1 x2.(exists e2 x3.(Actor(e2,x3) & v_watch(e2) & n_woman(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_shave(e1) & n_face(x2) & of(x2,x1) & n_thing(x1) & n_man(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_shave(e1) & n_woman(x1))