Sentence:  Participants included a non<WSD>streetworker</WSD>, as well as <WSD>streetworkers</WSD>, those who identified as being gay and those who were not, those who were injecting drug users and those who were not, those who were novice prostitutes and those who were not. [...] Getting the money up front was the universal practice among the female <WSD>streetworkers</WSD>. 
Meaning of the word marked with <WSD> tags:  A prostitute (who works on the street)