<http://schema.org/keywords>
"manny pacquiao freddie roach manny pacquiao vs tim bradley pacquiao vs bradley pacquiao olympics pacquiao retirement pacquiao vs maywheather pacquiao shoulder injury pacquiao injury"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/boxing/2016/03/24/manny-pacquiao-tim-bradley-freddie-roach-mayweather-olympics-philippines>