@prefix ns1: <https://martial.is/entity/> .
@prefix ns2: <https://w3id.org/martialis/ontology#> .
@prefix ns3: <https://martial.is/entity/01M5HN921CX8TVQ1ZQHEHXWDV4/hasInteraction/> .
@prefix ns4: <https://martial.is/entity/01M5HN921CX8TVQ1ZQHEHXWDV4/hasInteraction/0/hasEvidence/> .
@prefix ns5: <https://w3id.org/martialis/vocab/information-type/> .
@prefix ns6: <https://w3id.org/martialis/vocab/evidence-type/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ns7: <http://www.w3.org/ns/prov#> .
@prefix ns8: <https://martial.is/entity/01M5HN921CX8TVQ1ZQHEHXWDV4/> .
@prefix ns9: <https://martial.is/agent/> .
@prefix ns10: <https://martial.is/entity/01M5HN921CVE8GE854QJZ5898G/hasEvidence/> .
@prefix schema: <https://schema.org/> .
@prefix ns11: <https://martial.is/entity/01M5HN921CVE8GE854QJZ5898G/nationality/> .

ns1:01M5HN921CVE8GE854QJZ5898G a ns2:Person ;
    schema:description "African American martial artist (born 1937) who studied judo, jujutsu and knife fighting with Ernie Cates and Isshin-ryu karate with Don Nagle in the US Marine Corps, then taught \"Koga Ryu\" in Brooklyn from 1959."@en ;
    schema:keywords "karate", "ninjutsu" ;
    schema:name "Ronald Duncan"@en ;
    schema:nationality ns11:0 ;
    ns2:hasEvidence ns10:0 ;
    ns2:hasTeacherAssertion ns1:01M5HN921CX8TVQ1ZQHEHXWDV4 ;
    ns2:researchNote "Green & Svinth (pp. 627–628): his judo, jujutsu and knife-fighting teacher was Ernie Cates (no record yet)." ;
    ns2:wasTaughtBy ns1:01M5HN921C7XN6G4ZJ2GNV28B9 .
ns1:01M5HN921CX8TVQ1ZQHEHXWDV4 a ns2:TeacherAssertion ;
    ns2:assertedStyle ns1:01KZEK8ETSGM12GPJJS2THBX95 ;
    ns2:hasConfidence ns8:hasConfidence ;
    ns2:hasInteraction ns3:0 ;
    ns2:role <https://w3id.org/martialis/vocab/teacher-role/student> ;
    ns2:teacher ns1:01M5HN921C7XN6G4ZJ2GNV28B9 .
ns3:0 a ns2:TeacherInteraction ;
    ns7:wasDerivedFrom ns1:01M5G930MN1VM84DEZNGEZP48E ;
    ns2:hasEvidence ns4:0 .
ns4:0 a ns2:SourceAssertionRelation ;
    ns2:basedOnSource ns1:01M5G930MN1VM84DEZNGEZP48E ;
    ns2:evidenceType ns6:direct ;
    ns2:informationType ns5:secondary ;
    ns2:quotation "After serving in the U.S. Marine Corps, where he studied judo, jujutsu, and knife fighting with Ernie Cates (1933–) and Isshin-ryu karate with Don Nagle (1938–), Duncan began teaching “Koga Ryu” in Brooklyn in 1959." ;
    ns2:sourceLocation "627-628" ;
    ns2:sourceLocatorLabel "page" ;
    ns2:supports true .
ns8:hasConfidence a ns2:Confidence ;
    ns7:wasAttributedTo ns9:FSM ;
    ns2:assessedBy ns9:FSM ;
    ns2:confidenceLevel <https://w3id.org/martialis/vocab/confidence-level/probable> ;
    ns2:confidenceRationale "Single source." .
ns10:0 a ns2:SourceAssertionRelation ;
    ns2:basedOnSource ns1:01M5G930MN1VM84DEZNGEZP48E ;
    ns2:evidenceType ns6:direct ;
    ns2:informationType ns5:secondary ;
    ns2:sourceLocation "627-628" ;
    ns2:sourceLocatorLabel "page" ;
    ns2:supports true .
ns11:0 a ns2:NationalityEntry ;
    schema:addressCountry <http://publications.europa.eu/resource/authority/country/USA> ;
    schema:sameAs <http://www.wikidata.org/entity/Q30> .