About: http://webisa.webdatacommons.org/147304231

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	This approach is to choose each set of r problems from U and evaluate it against all players in P. Since your problem does appear to be NP-Complete, the best you can probably hope for is an approximation.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com