<http://schema.org/alternativeHeadline>
"Twitter co-founder will be joined by 'Morning Joe' co-hosts Mika Brzezinski and Joe Scarborough at the opening plenary celebration."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/money/green-workplace/blogs/biz-stone-will-speak-at-greenbuild-2012-opening>