A elderly man wearing a blue sweater is surrounded by pigeons on the street.
An old man is feeding birds.
Being surrounded by birds doesn't mean the man has fed them or is feeding them
exists e1 e2 s1 s2 x1 x2 x3 x4 x5.(n_street(x5) & Actor(e2,x4) & on(x4,x5) & n_pigeon(x4) & Theme(e2,x1) & v_surround(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_sweater(x3) & a_blue(s2) & Theme(s2,x3) & (x1 = x2) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_feed(e1) & n_bird(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))