Use columns 1 and 2 to populate column 3

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Track title: Light Drops

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Chapters
00:00 Question
01:25 Accepted answer (Score 7)
02:10 Answer 2 (Score 5)
03:42 Answer 3 (Score 3)
04:44 Answer 4 (Score 0)
05:07 Thank you

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Full question
https://stackoverflow.com/questions/5372...

Accepted answer links:
[@jezrael's answer]: https://stackoverflow.com/a/53724569/475...

Answer 2 links:
[Does iterrows have performance issues?]: https://stackoverflow.com/a/24871316/290...

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Tags
#python #pandas

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