_:b1 <http://example.org/value> "x" <http://example.com/g1> .
_:b2 <http://example.org/value> "y" <http://example.com/g1> .
_:b4 <http://example.org/value> "b" <http://example.com/g2> .
_:b3 <http://example.org/value> "a" <http://example.com/g2> .
_:b0 <http://example.org/input> <http://example.com/g1> .
_:b0 <http://example.org/input> <http://example.com/g2> .
