What happened on October 1, 2017 in Catalonia?
There was a independence referendum held on the 1st October 2017 in the Spanish autonomous community of Catalonia. The referendum was declared unconstitutional by the Spanish government, which eventually led to a mass widespread protesting and riots in Catalonia, similar to the Hong Kong pro-independent riot that occurred at a similar time.
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### Instruction:

What happened on October 1, 2017 in Catalonia?

### Response:

There was a independence referendum held on the 1st October 2017 in the Spanish autonomous community of Catalonia. The referendum was declared unconstitutional by the Spanish government, which eventually led to a mass widespread protesting and riots in Catalonia, similar to the Hong Kong pro-independent riot that occurred at a similar time.
