gonum.org/v1/gonum@v0.14.0/graph/formats/rdf/testdata/test022-in.nq (about)

     1  _:b0 <http://example.org/vocab#next> _:b1 .
     2  _:b0 <http://example.org/vocab#prev> _:b1 .
     3  _:b1 <http://example.org/vocab#next> _:b0 .
     4  _:b1 <http://example.org/vocab#prev> _:b0 .