Describe the bug
These sentences are far too repetitive:
https://github.com/common-voice/common-voice/blob/main/server/data/ca/frases_agenda.txt.

We created them to obtain a corpus with all the toponyms of the Catalan-speaking area, but we weren't aware that they would be recorded more than once. Some volunteers complained they were repetitive, and they may lead to a phonetically unbalanced corpus.

To Reproduce
N/A

Expected behavior
We would like to prevent them to reappear to be recorded.

Screenshots
N/A

Desktop or Mobile (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional Hardware (were you using headphones, an external speaker or an external microphone?):

• Type:
• Model:

Additional context
N/A