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.

Ex Input:
The lawyer yelled at the hairdresser because she did a bad job .

Ex Output:
the, hairdresser, she


Ex Input:
The construction worker waved the housekeeper into the room to ask her a question .

Ex Output:
the, housekeeper, her


Ex Input:
The salesperson sold some books to the librarian because she wanted to learn .

Ex Output:

the, librarian, she