Q: "Two healthy horses play in a field." Does this mean that "Some mares are frolicking in tall grass."?
A: it is not possible to tell

Q: "Tourists enjoying the local shops." Does this mean that "Tourists are outside touring some shops."?
A: yes

Q: "A railroad worker working on the rails." Does this mean that "A Ship is driving on the rails"?
A: no

Q: "A person with long hair stares out of the window on the top level of a double decker bus." Does this mean that "the bus is full of tourists"?
A:
it is not possible to tell