A man playing a cello along with a woman playing an accordion in the street.
A married couple plays instruments in the street.
It cannot be inferred that the man and woman are a married couple.
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 s1 x1 x2 x3.(n_street(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & n_couple(x1) & a_married(s1) & Theme(s1,x1))