How to clean up messy data using Open Refine

How to clean up messy data using Open Refine

Open Refine describes itself as 'a power tool for working with messy data, cleaning it up, transforming it from one format into another, extending it with web services and linking it to databases like Freebase.'  It was borne out of a project started by Google (and used to be called Google Refine), but is now an open source project hosted on Github.

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