README.md in pollster-0.2.1 vs README.md in pollster-0.2.2

@@ -47,18 +47,22 @@
     chart = Chart.find 'us-health-bill'
     chart.polls.map { |poll| [poll.pollster, poll.method] }
 
 ## Usage
 
-Pollster provides two classes:
+Pollster provides three classes:
 
     Pollster::Chart
 
-represents the current estimates for a Pollster chart (e.g. [Romney vs. Obama](http://elections.huffingtonpost.com/pollster/2012-general-election-romney-vs-obama))
+represents the current estimates for a Pollster chart (e.g. [Romney vs. Obama](http://elections.huffingtonpost.com/pollster/2012-general-election-romney-vs-obama)).
 
     Pollster::Poll
 
 represents a specific poll conducted by a polling firm.
+
+    Pollster::Question
+
+represents a question asked as part of a poll.
 
 ### Accessing data
 
 List all the charts available from Pollster: