Changes

         _voice_actor = nil,

         _voice_actor = nil,

         _artist = "Parsley",

         _artist = "Parsley",

         _implementation_date = "2017-02-11",

         _implementation_date = {year=2017,month=2,day=11},

         _availability = nil,

         _availability = nil,

         _wikipedia = "Japanese destroyer Matsukaze (1923)",

         _wikipedia = "Japanese destroyer Matsukaze (1923)",