Since that time, there have been a series of published statements/articles from the American Dental Association (ADA) and Canadian Dental Association (CDA), all claiming that dental amalgam was safe for use as a filling material.
(all; claiming; that dental amalgam was safe for use as a filling material) Context(all claiming,List([157, 169))):(dental amalgam; was; safe for use as a filling material)
all claiming,List([157, 169))
all dental amalgam
claiming was
that dental amalgam was safe for use as a filling material
safe for use as a filling material