Database: planet_1
Question: What are the number of packages sent by Zapp Brannigan and shipped on the Omicron Persei 8?
SQL:
SELECT T1.PackageNumber FROM PACKAGE AS T1 JOIN Client AS T2 ON  T1.Sender = T2.AccountNumber JOIN Shipment AS T3 ON T1.Shipment = T3.ShipmentID JOIN Planet AS T4 ON T3.Planet = T4.PlanetID WHERE T2.Name = "Zapp Brannigan" AND T4.Name = "Omicron Persei 8";