People walking on the side of the road during a snowy day.
Two people are throwing paper airplanes at each other in class.\
They can't be on the side of the road and in class at the same time.
exists e1 s1 x1 x2 x3 x4 x5.(n_road(x4) & n_side(x3) & a_topic(x1) & during(e1,x5) & n_day(x5) & a_snowy(s1) & Theme(s1,x5) & on(e1,x3) & of(x3,x4) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
(x)