A black man plays guitar while another man watches.
The Jimi Hendrix concert had a really impressive turnout.
The black man is not necessarily Jimi Hendrix, not is he playing a concert with an impressive turnout.
exists e1 p1 s1 x1 x2.(exists e2 x3.(Actor(e2,x3) & v_watch(e2) & n_man(x3) & -(x3 = x1)) & n_man(x1) & n_man(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & a_black(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(n_concert(x1) & (x1 = x3) & ne_per_hendrix(x3) & (x1 = x2) & ne_per_jimi(x2) & Theme(e1,x4) & Actor(e1,x1) & v_have(e1) & n_turnout(x4) & a_impressive(s1) & Theme(s1,x4) & r_really(x4))