A small bird sits in a person's hand and eats seeds.
The person is the zookeeper.
A person holding a bird is not necessarily a zookeeper.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5.(Theme(e2,x5) & Actor(e2,x4) & v_eat(e2) & n_seed(x5) & n_bird(x4) & a_small(s2) & Theme(s2,x4) & in(e1,x3) & n_hand(x3) & of(x3,x2) & n_person(x2) & Actor(e1,x1) & v_sit(e1) & n_bird(x1) & a_small(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_zookeeper(x2) & n_person(x1) & (x1 = x2))