title: using TOKENIZE in PIG
body: <p>I am trying to use the TOKENIZE function in PIG with a document that is comma separated. I would like to split on the commas, but NOT on white space. For example I would like for a list of 
  (car, toy car, bunny) to be ((car), (toy car), (bunny) not ((car), (toy), (car), (bunny)). 
  Is there a way to this?</p>