array(3) {
  [0]=>
  int(1921)
  [1]=>
  string(226) "<em>Ritze D., Meilicke C., Šváb-Zamazal O., Stuckenschmidt H.</em> A pattern-based ontology matching approach for detecting complex correspondences. Proceedings of the Fourth International Workshop on Ontology Matching, 2009"
  [2]=>
  int(23)
}
<h1>DB Error 230: Duplicate entry '1921-23' for key 'citations.citations_submission_seq'</h1>