How do I capture certain parts of a tweet that I find relevant from a set of profiles?


I’m trying to capture specific information from tweets by a set of profiles and I’m not sure if there are any tools to do that. For example, imagine Jim Cramer, investor, makes certain buy calls on some stocks throughout the day. I want to be able to capture his tweet that could possible say, something like, " Amazon is a great company, buy AMZN immediately". I would like to capture this data and record for many investors and for all their calls through Twitter. If anyone knows a way please let me know.