a man walking the streets while playing the guitar.
A man plays guitar.
A man plays guitar while walking down the streets.
exists e2 e1 x1 x2 x3 x4.(n_guitar(x4) & n_street(x3) & a_topic(x1) & while(e1,e2) & Theme(e2,x4) & Actor(e2,x2) & v_play(e2) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))