Four people performing music outdoors.
They are playing music together.
They are not necessarily playing music together.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_outdoors(x3) & of(x3,x4) & n_music(x4) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 s1 x1 x2.(n_thing(x1) & a_together(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2))