Fair goers play carnival game.
The people are playing a challenging game
Not all carnival games are challenging.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_game(x3) & a_carnival(s1) & Theme(s1,x3) & n_goer(x1) & (x1 = x2) & ne_nam_fair(x2))
exists e1 s1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_game(x2) & a_challenging(s1) & Theme(s1,x2))