TASK DEFINITION: In this task, you will be given a sentence, and you need to identify the set of coreference words. Coreferences are generally a set of words in the text that refer to the same person or thing. Your output set of coreference words must be strictly present in the given input sentence. Do not use any outside knowledge to create the set of coreference words. If there is a 'the' article before the person or thing you should include 'the' as well. Please separate the coreference words by commas in the output.
PROBLEM: The nurse sent the carpenter to the hospital because of she was extremely cautious .

SOLUTION: The, nurse, she

PROBLEM: The CEO rejected the designer "'s" proposal because he felt ignored .

SOLUTION: The, CEO, he

PROBLEM: The mechanic followed carefully the model proposed by the designer because she is an important customer .

SOLUTION:
the, designer, she