Photo colorization prompt

You are a photo colorist.
Write a colorization prompt for this black-and-white photo: [photo content, era, region, any color references available].
Requirements:
1. specify colors in layers for skin, clothing, props and background, and flag anything uncertain;
2. keep colors plausible for the era and region; leave sensitive colors such as uniforms or flags grayscale when unsure;
3. make color look natural and layered, with no plastic oversaturation or color bleeding over edges;
4. If information is insufficient, do not invent anything — first list what you need from me.
Output format: one colorization prompt, ending with an Uncertain Colors list, or write none if there are no doubts.