<http://schema.org/keywords>
"park, recreation center, amphitheater, Freizeitzentrum, Amphitheater, parc, centre de loisirs, l'amphith\u00E9\u00E2tre, parque, centro de lazer, anfiteatro"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/ecotourism-center_33214>