Old cannon. https://t.co/hOXtV1yLQV
Fort Canning Park
[]
FORT CANNING
['old', 'cannon', 'https://t.co/hoxtv1ylqv']
['cannon', 'cannon', 'cannon']
cannon
old cannon
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance issues."},
    ]

It seems that the Twitter post "old cannon" does not relate to a maintenance report feedback to a public flat house. It is not clear what the post is referring to, and it does not appear to be a complaint or feedback about any specific issue. Therefore, the answer is "relatedness": False, "type": "none", and "explanation": "This is not related to public housing or maintenance issues."