[Q]: Sentence: These properties may be useful when hydrogen is purified by passage through hot palladium disks, but the gas's high solubility is a metallurgical problem, contributing to the embrittlement of many metals, complicating the design of pipelines and storage tanks. Question: When are these useful?
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[A]: yes

[Q]: Sentence: His son Carl also played a role in the development of the original Connection Machine engineering; Feynman influencing the interconnects while his son worked on the software. Question: What did Feyman do while his son worked on software?
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[A]: yes

[Q]: Sentence: The barbarian invaders, including various Germanic peoples, formed new kingdoms in what remained of the Western Roman Empire. Question: In what state did barbarian invaders establish kingdoms?
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[A]:
yes