I'm at UB. One in Singapore https://t.co/pjyxckt2Eu
Central Region
[{'url': 'https://t.co/pjyxckt2Eu', 'expanded_url': 'https://www.swarmapp.com/c/grUmG695lfk', 'display_url': 'swarmapp.com/c/grUmG695lfk', 'indices': [28, 51]}]
KAMPONG UBI
["i'm", 'ub', 'one', 'singapore', 'https://t.co/pjyxckt2eu']
[]
ub 1 singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance issues."},
    ]

It seems that the Twitter post "ub 1 singapore" does not relate to a maintenance report feedback to public flat house. The post does not mention any specific issues or facilities related to public housing, and does not contain any keywords or hashtags related to maintenance or housing in Singapore. Therefore, the answer is "relatedness": False, "type": "none", and "explanation": "This is not related to public housing or maintenance issues."