instruction:
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.
question:
Context: Major attractions include white lions, white tigers Link Information: none Answer: none
answer:
Which of the large cats featured at the zoo is larger on average?


question:
Context: s shown on the map of Belgrade by Nicolas François de Spar, the Tsarigrad Road began at the Württemberg Gate (Stambol Gate), Link Information: none Answer: none
answer:
When was the Stambol Gate built?


question:
Context: There are six "Erie exits" along Interstate 90 Link Information: There are six "Erie exits" along Interstate 90 Answer: 3020.54
answer:

How long is the roadway that has six exits to Erie?