A man playing a cello along with a woman playing an accordion in the street.
The man playing the piano and the woman playing the drums happen to be married.
The cello and the piano are two different instruments.  The man is playing either the cello or the piano.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_street(x7) & a_topic(x1) & with(e1,x4) & Theme(e2,x6) & Actor(e2,x5) & v_play(e2) & in(x6,x7) & n_accordion(x6) & (x4 = x5) & n_woman(x4) & r_along(e1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_cello(x3) & (x1 = x2) & n_man(x1))
exists e1 e3 e2 p1 x1 x2 x3 x4 x5 x6 x7.(n_drum(x7) & n_woman(x5) & n_piano(x4) & n_man(x1) & Topic(e3,p1) & Actor(e3,x1) & v_happen(e3) & exists e4.(Theme(e4,x1) & v_marry(e4)) & Theme(e2,x3) & Actor(e2,x2) & v_play(e2) & subset_of(x5,x3) & Theme(e1,x7) & Actor(e1,x6) & v_play(e1) & (x5 = x6) & subset_of(x4,x3) & (x1 = x2))