In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Context: the Belgian Cup Link Information: The first cup was held in 1911-12. Answer: 1911-12
When did the first Belgian Cup take place?

Context: the First Carlist War, a civil war between supporters of the Spanish regent Maria Christina, known as liberals, and those of the late king's brother Carlos of Borbón, known as Carlists. Link Information: The city was untouched by the Second Carlist War, which took place mostly in Catalonia, Answer: 6
How many years passed between the First Carlist War and the  war that mostly in Catalonia?

Context: Of the 62 flying fox species evaluated by the IUCN as of 2018, Link Information: The International Union for Conservation of Nature (IUCN Answer: The International Union for Conservation of Nature

What does the IUCN stand for?