Question: On which island of New Zealand is the city where Diocletian is from located?
Related documents: [0]  [DOC] Diocletian was a New Zealand extreme metal band from Auckland. Formed in 2004, the band's final lineup featured Atrociter (guitar, vocals), L. Muir (guitar, vocals, bass), C. Sinclair (drums) and J. Baldwin (guitars). The band's 2015 album, "Gesundrian", was featured as number 15 on Pitchfork's list of "The Best Metal Albums of 2014". [END] 
[1]  [DOC] Auckland ( ) is a city in New Zealand's North Island. Auckland is the largest urban area in the country, with an urban population of around 1,495,000 . It is located in the Auckland Region—the area governed by Auckland Council—which includes outlying rural areas and the islands of the Hauraki Gulf, resulting in a total population of 1,614,300 . A diverse and multicultural city, Auckland is home to the largest Polynesian population in the world. The Māori language name for Auckland is "Tāmaki " or "Tāmaki-makau-rau ", meaning "Tāmaki with a hundred lovers", in reference to the desirability of its fertile land at the hub of waterways in all directions. It has also been called "Ākarana", the Māori pronunciation of the English name. [END] 
Answer: 
North Island
North Island