title: which is better... GATE or RapidMiner
body: <p>I've started to write a simple sentiment analysis tool.</p>
  
  <p>Currently I am looking at <a href="http://gate.ac.uk" rel="noreferrer">GATE</a> and <a href="http://rapid-i.com/" rel="noreferrer">RapidMiner</a> but being a beginner not able to concentrate on both.</p>
  
  <p>Could someone please tell me which one will be better in terms of usage, learning curve, licensing etc?</p>