One old homeless guy walks by the park.
A little boy is running after a squirrel.
An old homeless guy is not a little boy
exists e1 s1 s2 x1 x2.(n_park(x2) & by(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_guy(x1) & a_homeless(s2) & Theme(s2,x1) & a_old(s1) & Theme(s1,x1) & card_eq_1(x1))
exists e1 s1 x1 x2.(after(e1,x2) & n_squirrel(x2) & Actor(e1,x1) & v_run(e1) & n_boy(x1) & a_little(s1) & Theme(s1,x1))