Collect and correct airlines data

We need your help to go through, sanitize and update a table of all the airlines in the world. You will be shared a Google Sheet with our current airlines data. (~1300 rows) You'll then be asked to: * Check if the airline is still active and operational. * For every row, check that Name, Iata, Icao and origin country is correct. * Where relevant, add the correct alliance. * Collect a 80x60px PNG image of the airline logotype, named based on the Id column. (E.g. 1.png, 2.png, etc.) In the end, we want you to check if you can find any airlines that are missing in our database. We also ask you to look for possible duplicates in our database. You may use any data sources, as long as they can be considered reliable.