)]}'
{
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  "tree": "789fdc5f4b2f8d1d8e21c425cd54b0b6d4324b8d",
  "parents": [
    "915b1b234730be625bd714e3b5e8740ee223060a"
  ],
  "author": {
    "name": "Hao Zhu",
    "email": "haozhu233@gmail.com",
    "time": "Tue Dec 19 12:49:48 2017 -0500"
  },
  "committer": {
    "name": "Hao Zhu",
    "email": "haozhu233@gmail.com",
    "time": "Tue Dec 19 12:49:48 2017 -0500"
  },
  "message": "add scale_from to spec tools\n",
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