Sounds similar to https://cloud.google.com/generative-ai-app-builder/docs/chec....

"The check grounding API returns an overall support score of 0 to 1, which indicates how much the answer candidate agrees with the given facts. The response also includes citations to the facts supporting each claim in the answer candidate.

Perfect grounding requires that every claim in the answer candidate must be supported by one or more of the given facts. In other words, the claim is wholly entailed by the facts. If the claim is only partially entailed, it is not considered grounded."

There's an example input and grounded output scores that shows how the model splits into claims, decides if the claim needs grounding, and the resulting entailment score for that claim in: https://cloud.google.com/generative-ai-app-builder/docs/chec...