Two children participate in the game of Hockey.
Some kids are roller skating around cones.
Hockey and roller skating are two different hobbies.
exists e1 x1 x2 x3.(ne_nam_hockey(x3) & n_game(x2) & in(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_participate(e1) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Time(e1,x3) & n_roller(x3) & around(e1,x2) & n_cone(x2) & Actor(e1,x1) & v_skate(e1) & n_kid(x1))