Q: "A person with a backpack carrying bags of groceries down a sidewalk between houses." Does this mean that "A person carries groceries home."?
A: it is not possible to tell

Q: "A man and woman sitting on a parked car." Does this mean that "The car's color is red."?
A: it is not possible to tell

Q: "2 people walking on a street next to a caution sign" Does this mean that "2 people walking on a street avoiding a caution sign."?
A: it is not possible to tell

Q: "Passengers are crowded on a train." Does this mean that "People are packed in a train."?
A:
yes