people are playing a carnival game.
The people are riding a rollercoaster.
People can not play carnival games and riding a roller coaster at the same time.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_game(x2) & a_carnival(s1) & Theme(s1,x2) & n_people(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_rollercoaster(x2))