Man on stage playing his guitar.
A famous guitarist is giving a concert.
Not all persons that play guitar on stage is famous.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_guitar(x4) & of(x4,x1) & n_male(x1) & (x2 = x3) & n_stage(x2) & n_man(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_concert(x2) & n_guitarist(x1) & a_famous(s1) & Theme(s1,x1))