Music venues visited by only one participant ranking with dates

Rank and value for each participant with the dates the participant gained that rank and value
Rank	Participant	Rank date	Value	Value date
1	David	2021-09-26	41	2021-10-08
2	Denise	2021-10-08	30	2021-10-14
Ranking	2	2021-10-08	71	2021-10-14

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Data in a .csv file