Generating news articles

Hi, how do I generate realistic looking news articles given a title with the API? My current generations look decent for the most part. However, I have seen cases where the model just repeats text similar to the prompt over and over again. An example prompt would be:

Given a title, generate a news article.

Example title: Covid vaccines are mass-produced.
Example article: Ground-truth article

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Example Input title: Covid vaccine boosters
Article: to be generated by model …

Thank you for your assistance in advance!