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.
Q: Context : On that occasion, about a third of the commune of Ivry-sur-Seine was annexed to Paris, and now forms the Chinatown area of the 13th arrondissement of Paris.
Answer : 13th arrondissement of Paris
A:
By what was Ivry-sur-Seine replaced?