Many people run a marathon in winter.
No one ever runs a marathon.
When no  one is running , many people cannot be running.
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 s1 x1 x2.(a_ever(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & n_marathon(x2) & n_one(x1))