Two friends hold onto each other smiling while enjoying a musical festival.
Two friends sitting on the train.
The two friends cannot be sitting on the train and enjoying a musical festival simultaneously.
exists e1 x1 x3.(n_smile(x3) & all x2.((-(x2 = x3) & n_smile(x2)) -> exists e2 s1 x4.(while(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_enjoy(e2) & n_festival(x4) & a_musical(s1) & Theme(s1,x4) & onto(e1,x2))) & Actor(e1,x1) & v_hold(e1) & n_friend(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_train(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_friend(x1) & card_eq_2(x1))