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 Khan of Khiva and the Emir of Bukhara Link Information: none Answer: none
Which place has the highest recorded population, the place where the Khan came from or the place where the Emir came from?

Context: In 586 Link Information: none Answer: none
How many more troops were at the fight in 591 than the one in 586?

Context: Chafee was the only Republican in the Senate to vote against authorization of the use of force in Iraq in the lead-up to the Iraq War. Link Information: 1 (2%) of 49 Republican senators voted against the resolution: Sen. Chafee (R-RI). Answer: 2002

What year was Chafee the only Rebupblican to vote against an Iragi war bill?