I'm at Challenger in Singapore https://t.co/XJQWr1FjIx
<a href="http://foursquare.com" rel="nofollow">Foursquare</a>
East Region
[{'url': 'https://t.co/XJQWr1FjIx', 'expanded_url': 'https://www.swarmapp.com/c/fzhzd3WgV0g', 'display_url': 'swarmapp.com/c/fzhzd3WgV0g', 'indices': [31, 54]}]
XILIN
["i'm", 'challenger', 'singapore', 'https://t.co/xjqwr1fjix']
[]
challenger
challenger singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance reports."},
    ]

It seems that the Twitter post you provided does not relate to a maintenance report feedback to a public flat house in Singapore. The term "challenger Singapore" is not a specific reference to any particular issue or facility related to public housing. Therefore, the answer is "relatedness": False.