Compare unstructured texts with conditions within one index


The use case is that we want to see what is the difference between two unstructured text contents(transcripts) within one index. These two text contents will be selected based on filters(different time ranges; different attributes, etc.).

Find the differences, and show the differences in word cloud, will this be possible? I searched a lot about this use case, but I can't find one feasible. "transform" looks like a way to do it, but here the object of comparison is texts, which might need other ways to do it.

Thanks ahead for any help.

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