<http://schema.org/alternativeHeadline>
"Watch: Hank Aaron hits record-breaking 715th homer 40 years ago today"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/mlb/strike-zone/2014/04/08/video-hank-aaron-715th-homer-40th-anniversary-babe-ruth>