<http://a.example/s> <http://a.example/p> _:outerEl1 .
_:outerEl1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> "1"^^<http://www.w3.org/2001/XMLSchema#integer> .
_:outerEl1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:outerEl2 .
_:outerEl2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:innerEl1 .
_:innerEl1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> "2"^^<http://www.w3.org/2001/XMLSchema#integer> .
_:innerEl1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
_:outerEl2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .