Matches in DBpedia 2014 for { ?s ?p <http://delivery.acm.org/10.1145/1290000/1283937/a1981-codd.pdf?ip=178.25.80.110&acc=OPEN&key=1B55DF923F77674F55057ED4F3766CA0&CFID=221194362&CFTOKEN=58865617&__acm__=1370110684_b7591082d2746b1ffcc3d8188edfbad3> . }
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