Have a ton of text data, using Rapid miner, want to analyze it for 'bias', and more.

I've been using sentiment analysis APIs and so forth but besides that I'm really at a loss of what to do with all this data.
It's a bunch of scraped News articles and i'm trying to analyze how they present certain topics, if that helps.
My only idea is like.. check the n-grams.. extract the sentences dealing with the topics... i really dunno!!!
what else can I do with all this news data??
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