A lonely performer playing a black guitar.
A performer plays a guitar to an empty room.
Just because someone performs in an empty room does not mean they are lonely.
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & a_black(s2) & Theme(s2,x3) & (x1 = x2) & n_performer(x1) & a_lonely(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_room(x3) & a_empty(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_performer(x1))