Problem: Do "the chatbots" and "they" point to the same thing in the following sentence?

At the Loebner competition the judges couldn't figure out which respondents were the chatbots because *they* were so advanced.
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A: yes


Problem: Do "Sid" and "he" point to the same thing in the following sentence?

Sid explained his theory to Mark but *he* couldn't convince him.
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A: yes


Problem: Do "Bill" and "He" point to the same thing in the following sentence?

Dan had to stop Bill from toying with the injured bird. *He* is very cruel.
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A: yes


Problem: Do "the chickens" and "They" point to the same thing in the following sentence?

The foxes are getting in at night and attacking the chickens . *They* have gotten very nervous.
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A:
yes