Q: most data loggers are battery powered some also offer an option for external power.

A: Most data loggers are battery powered some also offer an option for external power.
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Q: included in these papers was his introduction of the denjoy index for the points of a perfect set.

A: Included in these papers was his introduction of the Denjoy index for the points of a perfect set.
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Q: it has been used as a backdrop for assemblies, events and spanish youth protest demonstrations, but its spaces, divided over different levels and partially shaded, are also appreciated and used by families and the elderly.

A:
It has been used as a backdrop for assemblies, events and Spanish youth protest demonstrations, but its spaces, divided over different levels and partially shaded, are also appreciated and used by families and the elderly.
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