Deletion of Tango tree

Comment: It's a relatively recent data structure introduced in 2004.  It has had some coverage at algorithm conferences: http://books.google.com/books?id=d-aOuXiDOrUC&pg=PA41&dq=%22Tango+tree%22&hl=en&ei=ZuXCTbbhNsv2gAf6xsSDAg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCkQ6AEwAA#v=onepage&q=%22Tango%20tree%22&f=false, http://books.google.com/books?id=d-aOuXiDOrUC&pg=PA41&dq=%22Tango+tree%22&hl=en&ei=ZuXCTbbhNsv2gAf6xsSDAg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCkQ6AEwAA#v=onepage&q=%22Tango%20tree%22&f=false.  It's included in a http://www.cs.princeton.edu/courses/archive/fall08/cos521/tango.pdf Princeton Algorithm Design course.  So it isn't |original research in the sense that this is some idea thought up by the original creator of the article.  It is a data structure known to those doing research in search algorithms
Stance: keep
Cited policy: Wikipedia:No original research (WP:OR)