A caravan of snowmobile travel through the snow.
A man is selling hot dogs.
A man cannot be a snowmobile
exists s1 x1 x2 x3.(n_snow(x3) & a_topic(x1) & through(x1,x3) & of(x1,x2) & n_travel(x2) & a_snowmobile(s1) & Theme(s1,x2) & n_caravan(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sell(e1) & n_dog(x2) & a_hot(s1) & Theme(s1,x2) & n_man(x1))