I'm at Gangnam Corndog in River Valley, Singapore https://t.co/0OmaxFO9kO
<a href="http://foursquare.com" rel="nofollow">Foursquare</a>
Central Region
[{'url': 'https://t.co/0OmaxFO9kO', 'expanded_url': 'https://www.swarmapp.com/c/glm82enOSvQ', 'display_url': 'swarmapp.com/c/glm82enOSvQ', 'indices': [50, 73]}]
CLARKE QUAY
["i'm", 'gangnam', 'corndog', 'river', 'valley', 'singapore', 'https://t.co/0omaxfo9ko']
[]
river valley
gangnam corndog river valley singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This post does not relate to a maintenance report feedback for a public flat house."},
    ]

It seems that the post does not mention anything related to maintenance report feedback for a public flat house in Singapore. The phrase "gangnam corndog river valley singapore" does not contain any keywords related to maintenance, facilities, or housing in Singapore. Therefore, the answer is "False" for the question "Does the post relate to a maintenance report feedback to public flat house (e.g., a broken facility, an inconvenience, block number or street, requst fixing, etc.)?"