A white dog retrieves the stick from the lake for her owner.
An animals plays with his owner at the lake.
A white dog is a type of animals (animal; there is a typo in the second sentence).
exists e1 s1 x1 x2 x3 x4.(n_owner(x4) & of(x4,x3) & n_female(x3) & n_lake(x3) & n_stick(x2) & Theme(e1,x2) & Actor(e1,x1) & v_retrieve(e1) & from(x2,x3) & for(x3,x4) & n_dog(x1) & a_white(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_lake(x3) & with(e1,x2) & at(x2,x3) & n_owner(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_play(e1) & n_animal(x1))