Prepare to Wet Yourselves

SemNews is fucking amazing.

Here's why: article.
RSS is consumed, the text is parsed for entities (countries, people, etc), actions, and more; it's all stuffed into a triple store and you can ask complicated queries like "Find everything involving the nation of Israel and Palestine and 'Aggressive' Actions".

It's a closed world system - An ontology from site B won't be the same as site A so easily, but... it's one hell of an impressive concept.