Rank,Poolparty,Rexplore,Saffron
"1","semantic web","semantic web","semantic web"
"2","linked data","ontology","rdf data"
"3","knowledge base","artificial intelligence","linked data"
"4","web service","information retrieval","natural language"
"5","web semantics","query languages","data source"
"6","data source","linked data","reasoning task"
"7","data sets","knowledge based systems","machine learning"
"8","description logic","natural language processing systems","query execution"
"9","on the web ","Computational Linguistics","owl S"
"10","natural language ","formal logic","ontology engineering"
"11","use cases ","data mining","rdf Graph"
"12","social network ","knowledge representation","User Interface"
"13","query languages </td><td>	human computer interaction","service description"
"14","search engines ","ontology matching","open data"
"15","query answering ","web ontology language (OWL)","semantic search"
"16","user interfaces ","description logic","query processing"
"17","semantic annotation ","linked open data (LOD)","keyword search"
"18","information retrieval","data integration","keyword query"
"19","web of data ","web services","owl ontology"
"20","open data </td><td>	resource description framework (RDF)","web service"
"21","data models","security of data","query language"
"22","semantic search ","ontology engineering","data model"
"23","ontology matching ","semantic search/similarity","ontology matching"
"24","information systems ","social networks","web data"
"25","query processing ","SPARQL","federated query"
"26","machine learning ","data privacy","stream processing"
"27","ontology language ","recommender systems","relational database"
"28","semantic web service","electronic commerce","blank node"
"29","linked open data ","sensors","information retrieval"
"30","logic programming ","ubiquitous computing","ontology language"
"31","knowledge management","semantic information","description logic"
"32","data integration ","SPARQL queries","federated query processing"
"33","ontology engineering","pattern recognition","semantic similarity"
"34","semantic technology","data visualization","object property"
"35","ontology alignment","knowledge acquisition","ontology editing"
"36","web search","information technology","social medium"
"37","web data","mobile devices","knowledge base"
"38","structured data","wikipedia","web technology"
"39","case studies","machine learning","web semantics"
"40","similarity measures","DBpedia","ontology development"