I'm at Serfing in Singapore, SG https://t.co/LBm1bYMPlM
Central Region
[{'url': 'https://t.co/LBm1bYMPlM', 'expanded_url': 'https://www.swarmapp.com/c/8r27qp9mSZR', 'display_url': 'swarmapp.com/c/8r27qp9mSZR', 'indices': [32, 55]}]
BOON KENG
["i'm", 'serfing', 'singapore', 'sg', 'https://t.co/lbm1bymplm']
[]
serfing singapore sg
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance reports."},
    ]

It seems that the Twitter post "serfing singapore sg" does not relate to a maintenance report feedback to public flat house. The post does not mention any specific issue or facility related to public housing, and therefore it does not fit into any of the categories I identified.