Hmmm (@ Serfing in Singapore, SG) https://t.co/EbaSO6IHEk
<a href="http://foursquare.com" rel="nofollow">Foursquare</a>
Central Region
[{'url': 'https://t.co/EbaSO6IHEk', 'expanded_url': 'https://www.swarmapp.com/c/ckFDx5Ef3Tm', 'display_url': 'swarmapp.com/c/ckFDx5Ef3Tm', 'indices': [34, 57]}]
BOON KENG
hmmm serfing singapore sg
  [
    {"relatedness": False, "type": "none", "explanation": "This post does not relate to a maintenance report feedback for a public flat house."},
    ]

It seems that the Twitter post "hmmm serfing singapore sg" does not contain any information related to a maintenance report feedback for a public flat house. The term "serfing" is not a common term in Singaporean context, and it is unlikely that the user is referring to a maintenance issue in a public flat house. Therefore, the post does not relate to the given category.