On a journey through Arts @ National Gallery Singapore https://t.co/ONIizDdKV1
Central Region
[{'url': 'https://t.co/ONIizDdKV1', 'expanded_url': 'https://www.instagram.com/p/CSgPIZLHQUn/?utm_medium=twitter', 'display_url': 'instagram.com/p/CSgPIZLHQUn/…', 'indices': [55, 78]}]
CITY HALL
['journey', 'art', 'national', 'gallery', 'singapore', 'https://t.co/oniizddkv1']
['journey', 'art', 'journey', 'art', 'art', 'journey', 'art', 'journey', 'art']
journey through national gallery
journey arts national gallery singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This post does not relate to a maintenance report feedback for a public flat house."},
    ]

The provided Twitter post does not contain any information related to a maintenance report feedback for a public flat house. Therefore, the answer is a JSON object with a "relatedness" field set to "False", a "type" field set to "none", and an "explanation" field set to a short explanation of why the post does not relate to the requested topic.