Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.

[EX Q]: Sentence: The current outbreak in West Africa , however taking place at the intersection of several countries ' porous borders helped this outbreak boom into an epidemic which has a global reach .<sep>Span: borders
[EX A]: Which borders are these?

[EX Q]: Sentence: But it can be hard for geologists to interpret what they see when they can ' t agree how old a rock is .<sep>Span: how old a rock is
[EX A]: Why does age of the rocks matter?

[EX Q]: Sentence: Wander into Cafe Rex in Oxkutzcab , Mexico , deep in the interior of the Yucatan Peninsula , and some odd things pop out on the menu .<sep>Span: odd things
[EX A]:
Why are odd things on the menu?