A guitarist plays for money on the street corner while sitting.
Someone is playing a guitar
A guitarist plays for money by playing the guitar.
exists e1 e2 x1 x2 x3 x4.(n_corner(x3) & of(x3,x4) & n_street(x4) & while(e1,e2) & Actor(e2,x1) & v_sit(e2) & on(e1,x3) & for(e1,x2) & n_money(x2) & Actor(e1,x1) & v_play(e1) & n_guitarist(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_person(x1))