I'm at Four Leaves in Singapore https://t.co/rfFVQ7ne7W
<a href="http://foursquare.com" rel="nofollow">Foursquare</a>
East Region
[{'url': 'https://t.co/rfFVQ7ne7W', 'expanded_url': 'https://www.swarmapp.com/c/4XTd0y9VTHX', 'display_url': 'swarmapp.com/c/4XTd0y9VTHX', 'indices': [32, 55]}]
BEDOK NORTH
["i'm", 'four', 'leaf', 'singapore', 'https://t.co/rffvq7ne7w']
[]
four leaves
4 leaves singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance issues."},
    ]

It seems that the Twitter post "4 leaves singapore" does not relate to a maintenance report feedback to public flat house. It is possible that the user is simply sharing a random fact or observation, or perhaps it is a code or reference to something else entirely. Without more context or information, it is difficult to provide a more specific explanation.