Q: In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.
Context: Chapeau to @lagazzetta changing its pink traditional colour to yellow in honour to Nibali's victory. #GazzettaGialla Alberto Contador (@albertocontador) July 28, 2014 Answer: nibali 's win
A:
whose win was being celebrated, by changing the color of the la gazzetta to yellow?