<http://schema.org/alternativeHeadline>
"Tonight US president Barack Obama delivers his annual address on the state of the country and his agenda for the year ahead."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/171529/why-gm-ceo-mary-barra-is-obamas-perfect-state-of-the-union-guest/>