The spotlight is on a guitarist who is playing in a band.
Nobody is performing.
The spotlight is on a guitarist who is playing in a band on the other side  Nobody is performing.
exists p1 x1.(n_spotlight(x1) & exists e1 x2 x3 x4.(on(x1,x2) & in(e1,x4) & n_band(x4) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_guitarist(x2)))
-exists e1 x1.(Actor(e1,x1) & v_perform(e1) & n_person(x1))