Long-term: Chorus time for every song

[Jasonnor]

Need help of providing chorus-section time for each song, as chorus_start_time and chorus_end_time below:

        {
          "name": "8.夢消失 ～ Lost Dream.mp3",
          "path": "/audio/th03/8.夢消失 ～ Lost Dream.mp3",
          "character": "カナ・アナベラル",
          "video_id": "wG4RaB7BB0A",
          "time": 0,
          "chorus_start_time": 51,
          "chorus_end_time": 128
        },

Time range is about 40 ~ 100 sec, and chorus-section can be the best part you think in the song (because the best melody of Touhou songs may appear in verse instead of chorus).
This will take a lot of time to be done, I need your help. 😋
You can commit to this file or give the chorus-section time of song in the issue. Thanks!