1st dose vaccinated! @ Raffles City Convention Centre https://t.co/WyzwDcNhsv
Central Region
[{'url': 'https://t.co/WyzwDcNhsv', 'expanded_url': 'https://www.instagram.com/p/CQfqJt1HFRx/?utm_medium=twitter', 'display_url': 'instagram.com/p/CQfqJt1HFRx/…', 'indices': [54, 77]}]
CITY HALL
['1st', 'dose', 'vaccinated', 'raffle', 'city', 'convention', 'centre', 'https://t.co/wyzwdcnhsv']
['convention', 'raffle', 'raffle']
dose city convention
1st dose vaccinated raffles city convention centre
  [
    {"relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat house."},
    ]

The given Twitter post does not relate to a maintenance report feedback to public flat house. The post mentions "1st dose vaccinated" and "raffles city convention centre", which do not appear to be related to maintenance or public housing. Therefore, the answer is { "relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat house." }.