Finding the right twitter users

From users who follow the Lakers, get a subset (how? what criteria? random? how many?)

From these, get their tweets, and do the keyword statistics to get the most common words. This will be our golden set.

We want to find the "active" followers of the Lakers.

Algorithm:
Get the list of followers of @Lakers.
Find users with the most followers themselves.
How do we determine active. Most followers, most tweets, most recent activity.