title: iphone - how to remove the html encoded string from nsstring?
body: <p>I obtain some text from Internet. There are sometimes characters like "&amp;a m p;", "&amp;q u o t;", etc in teh text.</p>
  
  <p>I guess they are some kind of unicode characters in Html. they are HTML encoded string, thanks for jason to point out.</p>
  
  <p>How should I filter all these kinds of things out of the text? I don't want any HTML related code characters. by the way, I am not talking about the HTML tags in the text, only these kinds of unicode things.</p>
  
  <p>thanks</p>