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 librarian helped the CEO to find the book because it is her job .

SOLUTION: The, librarian, her

PROBLEM: The cook prepared a soup for the housekeeper because he was testing a new dish .

SOLUTION: The, cook, he

PROBLEM: The cook asked the designer if she likes the new dish .

SOLUTION:
the, designer, she

