instruction:
Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.
question:
Sentence: The 29 - year - old Mateo , who was brought into the United States illegally at age 10, voluntarily flew back across the border recently in a protest aimed at recognizing the thousands of people deported from the United States over the last five years as the Obama administration struggles to adopt a long - range program for immigration reform .<sep>Span: struggles to adopt
answer:
Why is the struggle not outlined here? What are the struggles?


question:
Sentence: Conflicting age estimates for certain rocks differ by up to 4 billion years — the vast majority of Mars ’ planetary existence .<sep>Span: Conflicting age estimates
answer:
Why are they unable to agree on the ages?


question:
Sentence: Like Darwin ’ s finches or Great Britain ’ s peppered moths , these hedgehogs of the sea increasingly embody nature ’ s stunning capacity for resilience .<sep>Span: hedgehogs of the sea
answer:

Why are sea urchins known as hedgehogs of the sea?


