Premise: "A gas station with many parked cars."
Hypothesis: "Trucks and cars are parked on the side of the gas station."
Do we know that the hypothesis entailed by the premise? Stream of thoughts:
Many parked cars does not imply that there are trucks there also. Just because a gas station has parked cars does not mean that they are on the side of the gas station.
Therefore, the answer is it is not possible to tell.