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 farmer used the accountant for crop tabulation because he found the work confusing .
Example Output: The, farmer, he

Example Input: When the supervisor splashed the editor  he got in trouble .
Example Output: the, supervisor, he

Example Input: The physician examined the teacher and she was grateful .
Example Output:
the, teacher, she