Light-hearted moments at #APMEC2020 @ Centre for Medical Education Cenmed https://t.co/XcruZL1xyT
<a href="http://instagram.com" rel="nofollow">Instagram</a>
Central Region
[{'url': 'https://t.co/XcruZL1xyT', 'expanded_url': 'https://www.instagram.com/p/B7NTES7lzNilTHpbHdUH52zSPsIMzrRITAJ-7k0/?igshid=c024iehcjzcn', 'display_url': 'instagram.com/p/B7NTES7lzNil…', 'indices': [74, 97]}]
TOA PAYOH WEST
['light-hearted', 'moment', '#apmec2020', 'centre', 'medical', 'education', 'cenmed', 'https://t.co/xcruzl1xyt']
['medical', 'medical', 'medical', 'medical']
#apmec     medical education
lighthearted moments apmec2020 centre medical education cenmed
  [
    {"relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat house."},
    ]

The given Twitter post does not seem to be related to a maintenance report feedback for a public flat house. The post is about lighthearted moments at the APMEC2020 Centre for Medical Education, which is a different topic altogether. Therefore, the answer is a JSON object with "relatedness" set to False, "type" set to "none", and "explanation" set to a short explanation of why the post is not related to the requested topic.