A group of instrumentalists and vocalists dressed in black are being conducted by an older gentleman.
the group of surgeons in white
A group of instrumentalists dressed in black can't be a group of surgeons dressed in white
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7.(Actor(e2,x7) & n_gentleman(x7) & r_more(s2) & a_older(s2) & Theme(s2,x7) & Theme(e2,x1) & v_conduct(e2) & of(x1,x2) & Theme(e1,s1) & Theme(s1,x6) & a_black(s1) & Theme(e1,x5) & v_dress(e1) & (x2 = x5) & subset_of(x4,x2) & n_vocalist(x4) & subset_of(x3,x2) & n_instrumentalist(x3) & n_group(x1))
exists x1 x2 x3.(n_group(x1) & a_topic(x1) & in(x1,x3) & n_white(x3) & of(x1,x2) & n_surgeon(x2))