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

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
Why are they unable to agree on the ages?

Sentence: California and New York still lure hundreds of thousands of immigrants from across the globe , but Texas , Florida , Colorado and the Carolinas are far more magnetic for people already living in the country , according to new estimates released Thursday by the U . S . Census Bureau .<sep>Span: magnetic
why are these states magnetic?

Sentence: Ebola outbreaks in the past few decades have consistently " burned out " in relatively isolated and rural areas in Central Africa where ill patients did not come into contact with many individuals .<sep>Span: relatively
What do they mean by 'relatively'?