Brown dog barking at something off-camera, green background.
The dog is a Labrador Retriever.
Not all dogs are a Labrador Retriever.
exists s1 s2 s3 x1 x2 x3 x4 x5.(a_topic(x1) & at(x1,x3) & rel(x3,x5) & n_background(x5) & a_green(s3) & Theme(s3,x5) & Theme(s2,x4) & a_off-camera(s2) & (x3 = x4) & n_thing(x3) & n_barking(x1) & of(x1,x2) & n_dog(x2) & a_brown(s1) & Theme(s1,x1))
exists p1 x1.(n_dog(x1) & exists x2 x3.((x1 = x2) & ne_org_retriever(x2) & (x2 = x3) & ne_org_labrador(x3)))