Two happy people pose for a photo.
a couple poses for a selfie
Two happy people posing do not have to be a couple.
exists e1 s1 x1 x2.(for(e1,x2) & n_photo(x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1) & a_happy(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(for(e1,x2) & n_selfie(x2) & Actor(e1,x1) & v_pose(e1) & n_couple(x1))