At 1543 on 20 Apr 2021
Bird nest. 

#teespring @ Zhenghua Park https://t.co/CZ6kD4aUgf
West Region
[{'url': 'https://t.co/CZ6kD4aUgf', 'expanded_url': 'https://www.instagram.com/p/CN_91YZn9yD/?igshid=lrzrvamjm3rk', 'display_url': 'instagram.com/p/CN_91YZn9yD/…', 'indices': [63, 86]}]
BANGKIT
bird nest #teespring park
1543 20 apr 2021 bird nest teespring zhenghua park
  [
    {"relatedness": False, "type": "none", "explanation": "This post does not relate to a maintenance report feedback for a public flat house."},
    ]

The given Twitter post does not contain any information related to a maintenance report feedback for a public flat house. The post mentions "bird nest teespring zhenghua park" which does not seem to be related to maintenance or public housing. Therefore, the answer is a JSON object with "relatedness" set to False, "type" set to "none", and "explanation" set to a brief explanation that the post does not relate to the requested topic.