<http://schema.org/about>
"In a new customer satisfaction survey commissioned by the National Home Builders Association, respondents give green homeownership a ringing endorsement."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/at-home/blogs/survey-finds-owners-of-green-homes-to-be-a-content-remorse-free-bunch>