About: alkaline earth metals

Premodifier: alkaline earth
Head noun: metals

Same concepts
http://yago-knowledge.org/resource/wikicat_Alkaline_earth_metals
http://dbpedia.org/resource/Alkaline_earth_metal

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
calcium	isap:271911362	0.356670