Marella Explorer 2
Marella Explorer 2 , formerly Celebrity Century and SkySea Golden Era , was the lead ship of the "Century" class of cruise ships for Celebrity Cruises , and the co-flagship of the Celebrity fleet , along with "Millennium"-class ship , and the newest "Solstice" class , . 
<triplet> Marella Explorer 2 <subj> cruise ships <obj> instance of <subj> Celebrity Cruises <obj> operator