I'm at Yishun in Singapore https://t.co/SNvLp0K6vv
<a href="http://foursquare.com" rel="nofollow">Foursquare</a>
North Region
[{'url': 'https://t.co/SNvLp0K6vv', 'expanded_url': 'https://www.swarmapp.com/c/9c3vHGG3X4o', 'display_url': 'swarmapp.com/c/9c3vHGG3X4o', 'indices': [27, 50]}]
YISHUN CENTRAL
["i'm", 'yishun', 'singapore', 'https://t.co/snvlp0k6vv']
[]
yishun singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance issues."},
    ]

It seems that the tweet "yishun singapore" does not relate to a maintenance report feedback to public flat house. It is possible that the user is simply mentioning the location Yishun in Singapore, or sharing a personal experience or opinion unrelated to maintenance issues.