<http://schema.org/about>
"Despite the HPV vaccine being effective at preventing infections and cancers down the line, just one-third of teen girls complete the injection series."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/more-teen-girls-need-hpv-shot-says-cdc>