<http://webisa.webdatacommons.org/19917853>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/215359554>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/19917853> .
<http://webisa.webdatacommons.org/19917853>	<http://www.w3.org/ns/prov#value>	"In the abovementioned groups, M denotes a hydrogen atom or an alkali metal, such as sodium, potassium or lithium, or the equivalent of an alkaline earth metal, such as of calcium; preferably M is a hydrogen atom and in particular an alkali metal." .
<http://webisa.webdatacommons.org/19917853>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .