Thanks Lee! Here is the video link: 
Using Twitter Bios and GNIP Rules to Find Domain Specific Twitter Users and Important Tweets
Archives for May 2012
Boolean defined search, n-grams, word clouds, and custom topic dictionaries are power tools for text analysis and machine-learning
Discover central topics and also elusive but valuable unexpected or rare concepts. Use this information to train machine-learning classifiers to recognize relevant text and social media data. Jump into data using an interactive word CloudExplorer or build a mini topic dictionary using “defined” search. Try our new listview for seeing the top 300 bigrams and trigrams in your data
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