A dog licking its lips while snowfalls.
A dog licks it's butt.
A dog can not simultaneously lick its lips and its butt.
exists e1 x1 x2 x3 x4.(a_topic(x1) & while(e1,x4) & n_snowfall(x4) & Theme(e1,x3) & Actor(e1,x2) & v_lick(e1) & n_lip(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_dog(x1))
exists e1 p1 x1.(exists p2 x2.((x1 = x2) & n_butt(x2)) & n_thing(x1) & Topic(e1,p1) & Actor(e1,x1) & v_lick(e1) & n_dog(x1))