A young man walking down the street.
A man is sitting on a bench.
Walking an sitting are different activities, and a bench is not a street.
exists e1 s1 x1 x2 x3.(n_street(x3) & a_topic(x1) & down(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(on(e1,x2) & n_bench(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))