A young man and woman are playing some sort of stand up arcade game.
A couple is at the arcade
Not all young man and woman playing some sort of stand up arcade game are a couple.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(Theme(e1,x4) & Actor(e1,x1) & v_play(e1) & up(x4,x6) & n_game(x6) & a_arcade(s2) & Theme(s2,x6) & of(x4,x5) & n_stand(x5) & n_sort(x4) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_arcade(x2) & at(x1,x2) & n_couple(x1))