About: http://webisa.webdatacommons.org/372935072

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	For this problem, a rational number a/b is a good approximation of a real number ?? if the absolute value of the difference between a/b and ?? may not decrease if a/b is replaced by another rational number with a smaller denominator.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org