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.

The assistant scanned documents for the analyst because he asked .
the, analyst, he

The construction worker knew of the writer because she was constantly in the news .
the, writer, she

The mover told the teacher that he needed to make space for the sofa .

The, mover, he