["['Category:Actinides', 'Category:Rare earth elements', 'Category:Metalloids', 'Category:Chalcogens', 'Category:Halogens']", "['Halogens', 'Dietary minerals', 'Periodic table group 16', 'Heavy metals', 'Actinides']", "['Armenian Soviet Encyclopedia', 'Armenian Soviet Encyclopedia', 'Small Brockhaus and Efron Encyclopedic Dictionary', 'Armenian Soviet Encyclopedia', 'The Nuttall Encyclopædia']", "['C0025556', 'C0439879', 'C0013880', 'C0025552', 'C0347988']"]