A man in a uniform with glasses is playing a french horn.
A person playing xylophone.
A french horn is different from a xylophone.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_play(e1) & n_horn(x4) & a_french(s1) & Theme(s1,x4) & in(x1,x2) & with(x2,x3) & n_glass(x3) & n_uniform(x2) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_xylophone(x3) & (x1 = x2) & n_person(x1))