A blond singer, playing guitar.
A musician, performing.
Answer: A singer playing refers to the musician performing.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_singer(x1) & a_blond(s1) & Theme(s1,x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_musician(x1))