_:alice <friend> _:bob   .
_:alice <friend> _:carol .
_:alice <friend> <dave>  .

_:bob   <friend> _:carol .

_:carol <friend> _:bob   .
_:carol <friend> <dave>  .

_:erin  <friend> _:bob   .
_:erin  <friend> _:carol .

_:frank <friend> _:carol .
_:frank <friend> <dave>  .
_:frank <friend> _:erin  .

_:grace <friend> _:alice .
_:grace <friend> _:bob   .
_:grace <friend> _:carol .
_:grace <friend> <dave>  .
_:grace <friend> _:erin  .
_:grace <friend> _:frank .

_:alice <name> "Alice" .
_:bob   <name> "Bob" .
_:carol <name> "Carol" .
_:erin  <name> "Erin" .
_:frank <name> "Frank" .
_:grace <name> "Grace" .
