Indicate a noun phrase from given statement which mentions a pronoun.
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Question: at the loebner competition the judges couldn't figure out which respondents were the chatbots because they were so advanced.

Answer: they were so advanced.

Question: tom gave ralph a lift to school so he wouldn't have to drive alone.

Answer: he wouldn't have to drive alone.

Question: the drain is clogged with hair. it has to be removed.

Answer:
it has to be removed.