The complete datasets and exercises can be downloaded from these S3 links:

https://safe-inspire.s3.eu-west-2.amazonaws.com/datachallenge/share/exercise1.zip

https://safe-inspire.s3.eu-west-2.amazonaws.com/datachallenge/share/exercise2.zip

https://safe-inspire.s3.eu-west-2.amazonaws.com/datachallenge/share/exercise3.zip