The brown dog is watching the white dog chewing the blue string.
The dog is fat.
A dog does not have to be fat to be chewing string.
exists e2 e1 s1 s2 s3 x1 x2 x3.(n_string(x3) & a_blue(s3) & Theme(s3,x3) & n_dog(x2) & a_white(s2) & Theme(s2,x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_chew(e2) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1))
exists s1 x1.(n_dog(x1) & Theme(s1,x1) & a_fat(s1))