A bunch of young adults playing instruments.
The young adults are playing in a quintet.
The people could have been playing in a duet or band rather than in a quintet.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_instrument(x4) & (x2 = x3) & n_adult(x2) & a_young(s1) & Theme(s1,x2) & n_bunch(x1))
exists e1 s1 x1 x2.(n_adult(x1) & a_young(s1) & Theme(s1,x1) & in(e1,x2) & n_quintet(x2) & Actor(e1,x1) & v_play(e1))