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web data extraction ontologies diadem data integration form understanding databases ontological query answering semantic web query processing query optimization context-awareness web wrapper semantic annotation query answering web automation result page analysis big data datalog +/- ontological databases data analytics ontology web engineering data wrangling ontology matching data acquisition personalization database pervasive systems data science web data management datalog context modelling information noise sensors network web design table understanding web tables table recognition query rewriting keyword search medical emergencies medical information systems context awareness data management folksonomies phday doctorate data publishing ontology extraction schema evolution hardware databases rewriting domain-awareness semantics data tailoring document understanding judgement aggregation entity extraction odba automated reasoning computer science nlp aspect extraction natural language processing statistical learning data cleaning oxpath xpath data preparation data repair media intelligence artificial intelligence meltwater wrapidity web scraping dark data knowledge graph knowledge bases view composition query reformulation web understanding web forms uml class diagrams guarded fragment uml querying record extraction gazetteer generation gazetteers result-page understanding ontological querying reasoning web datalog+/- probabilistic and uncertain reasoning uncertain data management probabilistic query answering oxford martin school object search deos named entity extraction oxford information extraction