<http://schema.org/alternativeHeadline>
"From rooftop beehives to car-charging stations, here are the some of the most sustainable hotels in the U.S., according to TripAdvisor."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/lifestyle/eco-tourism/stories/10-of-the-greenest-hotels-in-the-us>