Mbs with Singapore flag whereas national day is coming soon. @ Marina Bay Sands https://t.co/IF7TcWmfVe
<a href="http://instagram.com" rel="nofollow">Instagram</a>
Central Region
[{'url': 'https://t.co/IF7TcWmfVe', 'expanded_url': 'https://www.instagram.com/p/CCzx0nvlN8K/?igshid=1xy2as0tt1185', 'display_url': 'instagram.com/p/CCzx0nvlN8K/…', 'indices': [80, 103]}]
BAYFRONT SUBZONE
['mb', 'singapore', 'flag', 'whereas', 'national', 'day', 'coming', 'soon', 'marina', 'bay', 'sand', 'https://t.co/if7tcwmfve']
['coming']
with flag whereas national coming soon marina
mbs singapore flag whereas national day coming soon marina bay sands
  [
    {"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 simply mentions Marina Bay Sands in Singapore and National Day, without any mention of maintenance or facilities related issues. 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.