Stanford and also Sid did an internship with lyft and with their data science team and so some of the inspiration for this work came from from talking and working with them so I guess what but I'm interested in getting across to you and what I found exciting about this problem is that there was a combination of maybe three things that we needed to somehow include in one model and and then use that to actually say something useful about the you know the strategy that the platform takes and that's basically that there's passengers and