Q: "A woman in a white shirt is playing tennis." Does this mean that "The woman is active"?
A: yes

Q: "There is number 12 on this ladies helmet." Does this mean that "A woman with the number 12 on her helmet is winning the cycling race."?
A: it is not possible to tell

Q: "A tourist dressed in black with long red-hair stands at a blue gate ready to take a photo with the camera strapped around her neck." Does this mean that "The tourist is about to take a picture."?
A: yes

Q: "Two women discussing a topic at the library." Does this mean that "Two women talk at the library."?
A:
yes