QUESTION: Fix punctuation: The overlapping packer rings were designed after rigorous testing in a wide range of conditions
ANS: The overlapping packer rings were designed after rigorous testing in a wide range of conditions.

QUESTION: Fix punctuation: is the capital of Denmark and its most populous city with an urban population of 1213822 as of 1 January 2012 2012 0101update and a metropolitan population of 1937611 as of 1 July 2012 2012 0701
ANS: is the capital of Denmark and its most populous city, with an urban population of 1,213,822 (as of 1 January 2012 (2012 -01-01)[update]) and a metropolitan population of 1,937,611 (as of 1 July 2012 (2012 -07-01).

QUESTION: Fix punctuation: surprise first time foursome swinger Spanish girlfriend amateur
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QUESTION: Fix punctuation: Climate warming is going to enable competitors to survive better where they are already at their northern margins change of their range The previous advantage of winter feeding by char will be reduced because warming is expected to be greatest in winter
ANS:
Climate warming is going to enable competitors to survive better where they are already at their northern margins change of their range. The previous advantage of winter feeding by char will be reduced because warming is expected to be greatest in winter.