Question: Robert F. Hughes, an American television director, worked on what American animated television series from the creators of "Phineas and Ferb"?
Sentence (from "Phineas and Ferb: Star Wars"): Phineas and Ferb: Star Wars (also titled Episode IVa: May the Ferb Be with You) is a 1-hour long crossover episode of the American animated series "Phineas and Ferb" featuring characters from "Star Wars".
Relevant evidence: No