Once upon a time https://t.co/yKKFQ6vazD
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Singapore Changi Airport (SIN)
[]
CHANGI AIRPORT
['upon', 'time', 'https://t.co/ykkfq6vazd']
['time']
once upon time
upon time
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance."},
    ]

It seems that the post does not relate to a maintenance report feedback to a public flat house. The post simply states "upon time" without providing any context or information that would suggest otherwise. Therefore, the answer is that the post does not relate to a maintenance report feedback to a public flat house.