Emphasis on RELIABLE.<p>I've tried both AlchemyAPI and Diffbot's API for author extraction to unreliable avail.<p>Both fail at, for example determining that Joel Klien is the author of:
http://swampland.time.com/2012/09/21/latest-column-romneys-imaginary-campaign/?iid=sl-article-arenapage<p>I did some testing to generate a larger sample size:<p>-----Deets at Quora: http://www.quora.com/Information-Extraction/Any-RELIABLE-author-extraction-APIs