How can I filter out unique results from grep output?

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Chapters
00:00 Question
00:25 Accepted answer (Score 153)
00:49 Answer 2 (Score 17)
01:21 Thank you

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Full question
https://superuser.com/questions/111430/h...

Accepted answer links:
[sort]: http://linux.die.net/man/1/sort
[uniq]: http://unixhelp.ed.ac.uk/CGI/man-cgi?uni...

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Tags
#linux #ubuntu #commandline

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