The lead guitarist is playing on stage.
A musician playing a guitar solo.
Playing on stage does not imply playing a solo.
exists e1 x1 x2 x3.(n_guitarist(x1) & of(x1,x2) & n_lead(x2) & on(e1,x3) & n_stage(x3) & Actor(e1,x1) & v_play(e1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_solo(x3) & of(x3,x4) & n_guitar(x4) & (x1 = x2) & n_musician(x1))