The sun is setting behind a group of people.
The run is rising in front of the people.
The sun cannot be setting and rising at the same time.
exists e1 x1 x2 x3.(n_sun(x1) & behind(e1,x2) & of(x2,x3) & n_people(x3) & n_group(x2) & Actor(e1,x1) & v_set(e1))
exists e1 x1 x2 x3.(n_people(x3) & n_run(x1) & in(e1,x2) & of(x2,x3) & n_front(x2) & Actor(e1,x1) & v_rise(e1))