I'm at Knock Knock Café in Singapore https://t.co/gv7Tet2Rb3
Central Region
[{'url': 'https://t.co/gv7Tet2Rb3', 'expanded_url': 'https://www.swarmapp.com/c/6zoSlQO4qiE', 'display_url': 'swarmapp.com/c/6zoSlQO4qiE', 'indices': [37, 60]}]
KAMPONG BUGIS
["i'm", 'knock', 'knock', 'café', 'singapore', 'https://t.co/gv7tet2rb3']
[]
knock knock
knock knock caf singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance report feedback."},
    ]

It seems that the tweet "knock knock caf singapore" does not relate to a maintenance report feedback to public flat house. It is possible that the user is simply mentioning the name of a cafe in Singapore, or that the tweet is unrelated to any specific topic. Without more context or information, it is difficult to provide a more detailed explanation.