A person doing a handstand on a street corner.
A street performer is doing handstands on the corner for extra cash.
A person could be doing handstands for many reasons, not only for extra cash.  Not all people doing handstands are street performers.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & on(x3,x4) & n_corner(x4) & of(x4,x5) & n_street(x5) & n_handstand(x3) & (x1 = x2) & n_person(x1))
exists e1 s1 x1 x2 x3 x4 x5.(n_corner(x4) & for(e1,x5) & n_cash(x5) & a_extra(s1) & Theme(s1,x5) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_handstand(x3) & n_performer(x1) & of(x1,x2) & n_street(x2))