Returning a relevant text snippet from a document?

We’re using Milvus to search a number of word documents and it’s working quite well. However, we’re wondering if it’s possible to return the most relevant sentence from the word document along with everything else (a la Google).

I have a hunch we’ll have to store each document sentence individual (perhaps in a separate collection?) and query them after the initial search query, but I don’t know how well that would scale or if it follows best practices.