@prefix ex: <https://example.com/graphs/query/> .
@prefix graph: <https://ontology.inferal.com/modules/graphs/> .

ex:e
    a graph:Edge ;
    graph:hasEndpoint ex:e-a, ex:e-b .

ex:a
    a graph:Vertex .

ex:b
    a graph:Vertex .

ex:e-a
    a graph:Endpoint ;
    graph:endpointOf ex:e ;
    graph:endpointVertex ex:a .

ex:e-b
    a graph:Endpoint ;
    graph:endpointOf ex:e ;
    graph:endpointVertex ex:b .