SPARQL | HTML5 RDFa and Microdata document
http://rdf.wikipathways.org/Pathway/WP138_r135108/WP/Interaction/a7272
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://vocabularies.wikipathways.org/wp#Interaction
http://purl.org/dc/terms/isPartOf
https://identifiers.org/wikipathways/WP138_r135108
http://vocabularies.wikipathways.org/wp#isAbout
http://rdf.wikipathways.org/Pathway/WP138_r135108/Interaction/a7272