HTML5 RDFa and Microdata document

https://identifiers.org/pmc/PMC5075206
- http://www.w3.org/1999/02/22-rdf-syntax-ns#type
  - http://vocabularies.wikipathways.org/wp#PublicationReference
- http://xmlns.com/foaf/0.1/page
  - http://www.ncbi.nlm.nih.gov/pubmed/PMC5075206
- http://purl.org/dc/elements/1.1/source
  - PubMed Central
- http://purl.org/dc/terms/identifier
  - PMC5075206
- http://purl.org/spar/cito/cites
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  - https://identifiers.org/wikipathways/WP460
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