use min entered and max exited date for each stage
use min entered and max exited date for each stage

CityofPittsburgh/pittsburgh-purchasing-suite,CityofPittsburgh/pittsburgh-purchasing-suite,codeforamerica/pittsburgh-purchasing-suite,codeforamerica/pittsburgh-purchasing-suite,CityofPittsburgh/pittsburgh-purchasing-suite,codeforamerica/pittsburgh-purchasing-suite,codeforamerica/pittsburgh-purchasing-suite,CityofPittsburgh/pittsburgh-purchasing-suite