Though co-occurrence of words/phrases/topics/names in messages can suggest that a relation exists between them, the type of relation is lacking.
though the following statistics are estimates only, the magnitude of public human language communication is staggering: • 3 million news articles/day 5 • Over 3 million blog posts/day 6 • 500 million tweets/day 7 learning the types of relations, the types of events, and so forth.