Three women and one man are posing for a picture.
Four people are posing for a picture.
Three women and one man makes four people.
exists e1 x1 x2 x3 x4.(for(e1,x4) & n_picture(x4) & Actor(e1,x1) & v_pose(e1) & subset_of(x3,x1) & n_man(x3) & card_eq_1(x3) & subset_of(x2,x1) & n_woman(x2) & card_eq_3(x2))
exists e1 x1 x2.(for(e1,x2) & n_picture(x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1) & card_eq_4(x1))