An old man sits.
An elderly male is feeding birds.
An old man sitting does not imply that he is feeding birds.
exists e1 s1 x1.(Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_feed(e1) & n_bird(x2) & n_male(x1) & a_elderly(s1) & Theme(s1,x1))