A developer is trying to build a prompt that instructs a language model to extract a product_name and sentiment from user feedback. They have constructed the following prompt, which includes a single demonstration before the final user request:

PROMPT START

Extract the product name and the user's sentiment from the following text.

Demonstration: Input: "The new Lumina-5 camera is absolutely fantastic! I love the picture quality." Output: {"product_name": "Lumina-5 camera"}

User Request: Input: "I'm very disappointed with the performance of the Aero-Drone. It stopped working after one flight." Output:

PROMPT END

Analyze the provided prompt. Explain why the single demonstration is poorly constructed for the stated task and how this flaw is likely to cause the model to produce an incomplete or incorrect output for the 'User Request' section.