###Instruction: Multi-class classification, answer with one of the labels:['no_consensus', 'delete', 'keep', 'comment', 'merge', 'redirect'] : ###Input:  Q23923879: Preface (The 3rd International Conference on Molecular Mechanisms of Metal Toxicity and Carcinogenesis) (Q23923879) : journal article published in 2005 : ( delete | history | links | entity usage | logs ) Mostly empty --- Jura 05:52, 26 April 2016 (UTC) User_talk:James_Hare_(NIOSH)#Creation_of_empty_items . --- Jura 05:53, 26 April 2016 (UTC) Delete This one only contains a DOI-link to an article titled "Preface". Lymantria ( talk ) 10:38, 26 April 2016 (UTC) Delete This one only contains a DOI-link to an article titled "Preface". Lymantria ( talk ) 10:38, 26 April 2016 (UTC)