If it's the Boston Screenplay (not Screenwriters) Awards, then they do have a list of winners on the site.   Here's a list of the winners:

https://bostonscreenplayawards.com/past-winners/

It also says you should submit through FilmFreeway.  I would suggest you check FilmFreeway because it gives information, including deadlines,  awards, reviews, etc. 

https://filmfreeway.com/BostonScreenplayAwards