Just posted a photo @ Mariners' Corner Restaurant https://t.co/hxYPB5eiCp
Central Region
[{'url': 'https://t.co/hxYPB5eiCp', 'expanded_url': 'https://www.instagram.com/p/CJEKJV9FbKB/?igshid=1qcp7m7hfldk4', 'display_url': 'instagram.com/p/CJEKJV9FbKB/…', 'indices': [50, 73]}]
EVERTON PARK
['posted', 'photo', 'mariner', 'corner', 'restaurant', 'https://t.co/hxypb5eicp']
[]
just posted photo corner restaurant
posted photo mariners corner restaurant
  [
    {"relatedness": False, "type": "none", "explanation": "This post does not relate to a maintenance report for a public flat house."},
    ]

It seems that the post you provided does not mention anything related to a maintenance report for a public flat house. The post only mentions a restaurant, which is not related to the given category. Therefore, the answer is { "relatedness": False, "type": "none", "explanation": "This post does not relate to a maintenance report for a public flat house." }.