title: //div[@class='address']/span
author: substring-before(//span[@class='credits'],',')
date: //div[@class='promodatepress']/span
body: //div[@class='default_style_wrap']
strip: //div[@class='text_adjust']
strip: //div[@class='skiplink']
strip: //h2
test_url: http://www.nasa.gov/mission_pages/kepler/news/kepler-21b.html