A street performer with a guitar.
Someone performs music.
Performer with a guitar implies performs music.
exists x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_guitar(x3) & n_performer(x1) & of(x1,x2) & n_street(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_music(x2) & n_person(x1))