People Running a Marathon.
People are running down a street.
A marathon always takes place on a street.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_run(e1) & ne_tim_marathon(x3) & (x1 = x2) & n_people(x1))
exists e1 x1 x2.(down(e1,x2) & n_street(x2) & Actor(e1,x1) & v_run(e1) & n_people(x1))