Sentence:  Back at the <WSD>Factory-to-You</WSD> with the other old maids , back there she was the youngest clerk and she was thirty-four , which made her young enough to resent the usual ideal working conditions , like the unventilated toilet with the door you had to hold shut while you sat down . 
Meaning of the word marked with <WSD> tags:  any number of entities (members) considered as a unit