A brown and white dog is walking next to a man on a skateboard.
A cat is on the porch
dog is not a cat
exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_skateboard(x3) & to(e1,x2) & n_man(x2) & r_next(e1) & Actor(e1,x1) & v_walk(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_brown(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_porch(x2) & on(x1,x2) & n_cat(x1))