You could have a deeper structure if you wanted, adding more Sub Levels. (atfmb.com)
It can be split up into more sub sectors such as parking, airports, hospitals, schools, etc.. (reimag.co.za)
Entitled «3C3C1D119440927 ″, the new content will give players three new colosseums and more sub quests.The quests will give players the following rewards after they are completed: Costumes from the previous Japanese release, NieR: Replicant, for androids... (provengamer.com)