A dog runs through snow with a big tree in the distance.
A cat rolling around in the snow.
Contradiction is the cat rolling and dog running as mentioned in first sentence.
exists e1 s1 x1 x2 x3 x4.(n_distance(x4) & in(e1,x4) & with(e1,x3) & n_tree(x3) & a_big(s1) & Theme(s1,x3) & through(e1,x2) & n_snow(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 p1 x1 x2 x3.(n_snow(x3) & a_topic(x1) & in(e1,x3) & exists s1.(Theme(s1,x2) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x2) & v_roll(e1) & (x1 = x2) & n_cat(x1))