<http://webisa.webdatacommons.org/108840511>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/161465324>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/108840511> .
<http://webisa.webdatacommons.org/108840511>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<bio-medicine.org> .
<http://webisa.webdatacommons.org/108840511>	<http://www.w3.org/ns/prov#value>	"A digit is a symbol used to write the numbers. ... models (rectangular arrays) for multiplication of one- and two- digit numbers. ..." .