A group of children are playing brass instruments.
A group of young humans.
A group of young humans are playing brass instruments.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & of(x3,x4) & n_brass(x4) & of(x1,x2) & n_child(x2) & n_group(x1))
exists s1 x1 x2.(a_topic(x1) & of(x1,x2) & n_human(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))