_:b56838914 _:b56838915 . _:b56838916 _:b56838917 . _:b56838914 . _:b56838917 "degradation" . _:b56838914 "0.87"^^ . _:b56838915 "C1156667" . _:b56838915 "T044" . _:b56838917 . _:b56838914 . _:b56838914 _:b56838916 . _:b56838914 . _:b56838916 .