premise: A woman stands in front of a car with inflated innertubes and a sofa balanced on top. hypothesis: A woman stands in front of a heavily loaded vehicle.
entailment: The fact that the car has inflated innertubes and a sofa balanced on top implies that the interior of the car is already so full that no more room could be found inside for these items.  A load sufficient to completely fill the interior of the car is generally sufficient to render the average car "heavily loaded" even without the extra cargo on top; for that matter, even the sofa alone would be enough, for many cars, to render the car "heavily loaded".