assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:11934 IAO:0000115 An organ system cancer that arises in the head or neck region. This region includes the nasal cavity, sinuses, lips, mouth, salivary glands, throat, or larynx. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007637""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007641""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://apps.who.int/bookorders/anglais/detart1.jsp?sesslan=1&codlan=1&codcol=70&codcch=9""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Head_and_neck_cancer""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.gov/cancertopics/factsheet/Sites-Types/head-and-neck""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.gov/dictionary?CdrID=257519""}]}"