Many people run a marathon in winter.
People run a marathon.
in a both sentence winter and run are not same.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & in(x2,x3) & n_winter(x3) & n_marathon(x2) & n_people(x1) & n_quantity(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & n_marathon(x2) & n_people(x1))