@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_problem_	skos:broader	<http://webisa.webdatacommons.org/concept/combinatorial+optimization_problem_> .
isac:_routing_	skos:broader	<http://webisa.webdatacommons.org/concept/combinatorial+optimization_problem_> .
isac:salesman_problem_	skos:broader	<http://webisa.webdatacommons.org/concept/combinatorial+optimization_problem_> .
isac:knapsack_problem_	skos:broader	<http://webisa.webdatacommons.org/concept/combinatorial+optimization_problem_> .