Exercise

Born and affiliated

Some countries are, for one or more laureates, both their country of birth ("bornCountry") and a country of affiliation for one or more of their prizes ("prizes.affiliations.country"). You will find the five countries of birth with the highest counts of such laureates.

Instructions

100 XP

Create an index on country of birth ("bornCountry") for db.laureates to ensure efficient gathering of distinct values and counting of documents
Complete the skeleton dictionary comprehension to construct n_born_and_affiliated, the count of laureates as described above for each distinct country of birth. For each call to count_documents, ensure that you use the value of country to filter documents properly.