A football player carries the ball during a game.
The ball is brown.
Not all balls are brown
exists e1 x1 x2 x3 x4.(n_ball(x3) & during(e1,x4) & n_game(x4) & Theme(e1,x3) & Actor(e1,x1) & v_carry(e1) & n_player(x1) & of(x1,x2) & n_football(x2))
exists e1 x1.(n_ball(x1) & Theme(e1,x1) & v_brown(e1))