The user wants me to rewrite a horse-racing news item as an original editorial article. However, I notice that the "Source summary" field is empty - there's no actual content provi

The user wants me to:
1. Create an original editorial article about horse racing (specifically about Quinté+ at Deauville)
2. Return it in strict JSON format with specific keys
3. Not copy from any source (which is good since there's no source content anyway)
4. Not invent results, winners, prices or quotes

Since there's no source content provided, I cannot rewrite anything. I should point this out to the user. However, I need to consider whether I should:
1. Ask for the source content
2. Create a generic article about Deauville horse racing

Looking at the instructions more carefully, the user says "Rewrite the following horse-racing news item" but provides no actual news item content. The "Source summary" field is completely empty.

I think the best approach is to politely explain that no source content was provided, so I cannot rewrite it. I should ask the user to provide the source content they want me to rewrite.

Wait, let me reconsider. The user might be testing me or this might be a template where they forgot to fill in the source. I should respond by noting that no source content was provided and ask for it.

Actually, looking at the strict instructions, I should return JSON. Let me format a response indicating the missing information.

{"erreur": "Aucun contenu source n'a été fourni. Le champ 'Source summary' est vide. Veuillez fournir l'article source à réécrire."}