[Q]: Sentence: The ISO 216 system used in most other countries is based on the surface area of a sheet of paper, not on a sheet's width and length. Question: What is the lowest numbered A paper that is commonly used at home?
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[A]: no

[Q]: Sentence: Later that year he was introduced to the wealthy Rothschild banking family, whose patronage also opened doors for him to other private salons (social gatherings of the aristocracy and artistic and literary elite). Question: What affluent family did Chopin gain a patronage from?
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[A]: yes

[Q]: Sentence: While this may affect the choice of an antenna, an antenna's impedance can also be adapted to the desired impedance level of a system using a matching network while maintaining the other characteristics (except for a possible loss of efficiency). Question: What factor would result in a desired feedback independence?
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[A]:
no