A white dog walking in the snow.
A dog is walking through a field in summer.
There would not be snow in the summer.
exists s1 x1 x2 x3.(n_snow(x3) & a_topic(x1) & in(x1,x3) & n_walking(x1) & of(x1,x2) & n_dog(x2) & a_white(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(in(e1,x3) & n_summer(x3) & through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_walk(e1) & n_dog(x1))