Which movie was released in the most different regions? And how many different regions?

Task

Write a SELECT statement that returns $($movie$,$ nregions$).$ That is$,$ the name of the movie $($that has been released in most regions$)$ and number of regions it has been released in$.$

Notes

Some movies have multiple entries for the same region

Count these as a single entry for that region for that movie

Regions that are NULL are not included in nregions