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.

Example Input: The lawyer needed the librarian to find a book because she knows how the library is organized .
Example Output: the, librarian, she

Example Input: The carpenter admires the work of the hairdresser because she is the best .
Example Output: the, hairdresser, she

Example Input: The manager fired the baker because he was upset .
Example Output:
The, manager, he