<http://schema.org/keywords>
"David Robertson yankees David Robertson free agent mlb free agency David Robertson 2015 yankees offseason moves David Robertson declines offer David Robertson qualifying offer david robertson contract"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/mlb/2014/11/10/david-robertson-declines-yankees-qualifying-offer>