At 0712 on 21 Apr 2021 @ Mandai, Singapore https://t.co/3lVvc0HVUA
North Region
[{'url': 'https://t.co/3lVvc0HVUA', 'expanded_url': 'https://www.instagram.com/p/CN6XEA2HJ2L/?igshid=1jd4l2ix4bgq9', 'display_url': 'instagram.com/p/CN6XEA2HJ2L/…', 'indices': [43, 66]}]
MANDAI EAST
712 21 apr 2021 mandai singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance."},
    ]

The provided Twitter post does not seem to relate to a maintenance report feedback for a public flat house. The post simply states the date and location (Mandai, Singapore) without providing any context or information related to maintenance or public housing. Therefore, the answer is "relatedness": False, and the type is "none".