A black dog is swimming in green water with something in its mouth.
A black dog is swimming.
A black dog is in green water swimming with something in its mouth.
exists e1 s1 s2 x1 x2 x3 x4.(in(e1,x4) & n_water(x4) & a_green(s2) & Theme(s2,x4) & with(e1,x2) & in(x2,x3) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_thing(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists p1 s1 x1.(exists x2.((x1 = x2) & n_swimming(x2)) & n_dog(x1) & a_black(s1) & Theme(s1,x1))