alan valenski, mary conra, andrew bennett, robert powell, joanne desmond. ken bessi. before the public commenters begin, i believe there is one more person that, supervisor mar, you wanted to invite up. >> yes, nick kenzi alerted me the professor who did the report is present. we wanted him to elaborate on a few points earlier made on the economic of the lands to san francisco's economy. and professor patrick turney is from san francisco state's department of recreation parks and tourism. but thank you so much for being here. >> this is to report on the economic study? given that you're not city staff, we'll have to give you two minutes and we'll ask follow-up questions. >>> okay. good afternoon. i quickly wanted to go over two key points about the economic impact study. first of all, it was done using two primary means of data collection. one is on-site validation survey with 22 1 completed interviews. the other was a post event online survey that had 35 51 completed responses. * we use a very conservative approach on this analysis. we excluded that is, we did not co