A group of four is playing instruments in the street.
A group is playing instruments for another group.
Sentence two may be talking about different group.
exists e1 x1 x2 x3 x4.(n_street(x4) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & of(x1,x2) & n_thing(x2) & card_eq_4(x2) & n_group(x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_group(x3) & -(x3 = x1) & n_group(x1) & n_group(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2))