array(3) {
  [0]=>
  int(4168)
  [1]=>
  string(96) "Uddin G., Robillard M. P. How API Documentation Fails // IEEE Software. 2015. Vol. 32. P. 68-75."
  [2]=>
  int(1)
}
<h1>DB Error 230: Duplicate entry '4168-1' for key 'citations.citations_submission_seq'</h1>