Problem: North Durham County Prison Camp , also known as Durham , Durham County , North Carolina is a historic prison ad sanatorium located at Durham County Tuberculosis Sanatorium .
North Durham County Prison - Camp , also known as Durham County Tuberculosis Sanatorium , is a historic prison at the Sanatorium in Durham , Durham County , North Carolina .
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A: no

Problem: However , Szabo 's method of double-spending protection was vulnerable to Sybil attacks .
Szabo 's method of double protection , however , was vulnerable to Sybil attacks .
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A: yes

Problem: He also worked in several houses and monasteries in Ghent , in Beaulieu Castle ( Belgium ) in Machelen and in Horst Castle .
He also worked in several houses and monasteries in Belgium , in the castle of Beaulieu ( Ghent ) in Machelen and in Horst Castle .
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A:
no