Children participate in a game of tug-of-war.
A class of children play tug-of-war against their teachers.
Children participating in a game of tug-of-war are not necessarily playing against their teachers.
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_tug-of-war(x3) & n_game(x2) & Actor(e1,x1) & v_participate(e1) & n_child(x1))
exists e1 x1 x2 x3 x4.(against(e1,x4) & n_teacher(x4) & of(x4,x1) & n_thing(x1) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_tug-of-war(x3) & of(x1,x2) & n_child(x2) & n_class(x1))