Q: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Context : ''The Vengeance Factor'' is the ninth episode of the third season of the science fiction television series Star Trek: The Next Generation, and the 57th episode of the series overall.
Answer : Star Trek: The Next Generation
A:
What series is The Vengeance Factor a part of?