What is the fine-grained topic of the following text: Professor Poia Rewi (Tūhoe, Ngāti Manawa, Te Arawa) is Dean of Te Tumu, School of Māori, Pacific & Indigenous Studies, University of Otago and researches Indigenous language revitalisation, te reo me ngā tikanga Māori, Māori oratory, Māori performing arts and Māori history. Only return the topic.
Professor Poia Rewi's role and research areas in Māori, Pacific & Indigenous Studies.