Gives the model the context and the constraints it needs to answer your case rather than the average one.
What it actually does: subject, appearance, Young woman with mixed ethnicity features, fair skin, and long, layered dark brunette hair falling loosely around her shoulders.
{
"subject": {
"appearance": "Young woman with mixed ethnicity features, fair skin, and long, layered dark brunette hair falling loosely around her shoulders. Natural, fresh-faced makeup loo...