A black and white dog with a stick in its mouth is swimming.
A cat with a stick in its mouth is in a bathtub.
There can be either a dog or a cat with a stick in its mouth and it is swimming or in the bathtub.
exists p1 s1 s2 x1 x2 x3.(exists x4.((x1 = x4) & n_swimming(x4)) & with(x1,x2) & in(x2,x3) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_stick(x2) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
exists p1 x1 x2 x3.(exists x4.(in(x1,x4) & n_bathtub(x4)) & with(x1,x2) & in(x2,x3) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_stick(x2) & n_cat(x1))