I'm at Kbox https://t.co/UI3yGjOaOx
East Region
[{'url': 'https://t.co/UI3yGjOaOx', 'expanded_url': 'https://www.swarmapp.com/c/2sbGejZeN4P', 'display_url': 'swarmapp.com/c/2sbGejZeN4P', 'indices': [12, 35]}]
TAMPINES EAST
["i'm", 'kbox', 'https://t.co/ui3ygjoaox']
[]
kbox
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance."},
    ]

It seems that the Twitter post does not relate to a maintenance report feedback to a public flat house. The post simply contains the letter "kbox" with no context or information that would suggest otherwise. Therefore, the answer is that the post does not relate to this category.