<http://webisa.webdatacommons.org/127842848>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/prov/472367344>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/127842848> .
<http://webisa.webdatacommons.org/127842848>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/127842848>	<http://www.w3.org/ns/prov#value>	"that at least one X is a hydrogen, and y is a number between 1 and 3. Preferred alkali and alkaline earth metals include lithium, sodium, potassium, berylium, calcium, and magnesium. X may be chosen from the group including zinc and manganese as well." .