<s>[INST] What does "they" refer to in each of the following two sentences: 
a) "The authorities have denied authorization to the demonstrators because they feared violence."
b) "The authorities have denied authorization to the demonstrators because they appeared belligerent." [/INST] Based on the context of the sentences, I believe that "they" in the first sentence refers to the authorities, while "they" in the second sentence refers to the demonstrators.</s>\ <s>[INST] What linguistic problem does this demonstrate? [/INST] This demonstrates the problem of pronoun ambiguity, where the meaning of a pronoun is unclear without additional context.</s>