_:b61538869 . _:b61538868 _:b61538869 . _:b61538869 _:b61538870 . _:b61538872 _:b61538873 . _:b61538871 "2015-12-31"^^ . _:b61538869 _:b61538872 . _:b61538870 _:b61538871 . _:b61538873 "2015-01-01"^^ .