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 analyst asked the cleaner to pick up papers because she always forgot .
Example Output: the, cleaner, she

Example Input: The carpenter created a beautiful chair for the receptionist because she asked .
Example Output: the, receptionist, she

Example Input: The manager told the clerk to report to work early because she is lazy .
Example Output:
the, clerk, she