How to match digits followed by a dot using sed?

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Music by Eric Matyas
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Track title: Music Box Puzzles

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Chapters
00:00 Question
00:31 Accepted answer (Score 217)
00:50 Answer 2 (Score 118)
01:16 Answer 3 (Score 11)
01:48 Answer 4 (Score 7)
02:28 Thank you

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Full question
https://superuser.com/questions/513412/h...

Accepted answer links:
[here]: http://www.gnu.org/software/sed/manual/h...

Answer 3 links:
[-E]: https://www.gnu.org/software/sed/manual/...

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Tags
#regex #sed

#avk47