Congrats to Mr/Mrs. Seller! 
Thanks to our client who refer their friends to us. 
This is an open listing with a very stringent requirement by sellers. There are 3 other agents marketing this property since Nov 2019,… https://t.co/oBdoKo7A3K
<a href="http://instagram.com" rel="nofollow">Instagram</a>
Central Region
[{'url': 'https://t.co/oBdoKo7A3K', 'expanded_url': 'https://www.instagram.com/p/B_Na-TanCxK/?igshid=uzoovnkfl05o', 'display_url': 'instagram.com/p/B_Na-TanCxK/…', 'indices': [218, 241]}]
CITY HALL
['congrats', 'mr', 'mr', 'seller', 'thanks', 'client', 'refer', 'friend', 'u', 'open', 'listing', 'stringent', 'requirement', 'seller', '3', 'agent', 'marketing', 'property', 'since', 'nov', '2019', '…', 'https://t.co/obdoko7a3k']
['friend', 'friend', 'friend']
seller thanks client refer their this open listing with very stringent requirement there other marketing this property since
congrats mr mrs seller thanks client refer friends us open listing stringent requirement sellers 3 agents marketing property since nov 2019
  [
    {"relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat house."},
    ]

It seems that the provided Twitter post does not relate to a maintenance report feedback for a public flat house. The post congratulates a seller and thanks a client for referring friends to a property listing, and does not mention any issues or concerns related to maintenance or infrastructure. Therefore, the answer is a JSON object with "relatedness" set to "False", "type" set to "none", and "explanation" set to a short explanation indicating that the post is not related to the requested topic.