[teachable] Extract chapter metadata (closes #24421)
authorSergey M․ <dstftw@gmail.com>
Mon, 23 Mar 2020 19:43:24 +0000 (02:43 +0700)
committerSergey M․ <dstftw@gmail.com>
Mon, 23 Mar 2020 19:57:32 +0000 (02:57 +0700)

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