mr. carlson will remember from his time at public works. at the time of initial adoption by the city, it was the best in breed and by the time we cut off, we were the last county to use it. a very significant upgrade. we only go through these every 20 or 30 years in the city. we're still in the middle of it. we're transitioning in different parts of the system at different levels of stability and working to stabilize the system. the piece of the system that i think most directly pertains to the work of the committee is conversion of data from one chart of accounts to the new chart of accounts and what it means for reporting. so you go through a massive crosswalk of data between june 30th and july 1st cutting from one system to another. inevitably in a conversion like this, you have data conversion errors where despite testing and the rest, data ends up where it wasn't intended to be. so in any project, you have an element of cleaning up the data conversions. we had a significant number of data conversion errors in one specific part of the w

mr. carlson. >> public: i want to congratulate you on this legislation that you passed in 2016 is indeed model legislation for cities all around the country and indeed all around the globe. that's a little ironic considering that platform accountability, which has brought us this great success along with the good efforts of mr. guy and his office, platform accountability was at the heart of proposition f. when we brought platform accountability to you and you passed it unanimously, airbnb sued and yet now they praised us as the greatest thing san francisco has ever done. i'm happy everybody is happy. there are still problems with short-term rentals. the hosted and unhosted rentals is still not enforceable. we are concerned about the proliferation of large apartment buildings that are becoming part of airbnb so called friendly buildings program. when you have a hundred buildings and every single one is eligible to be used, seems to be it should trigger some safety concerns. concerns about how the ada applies. those are all questions worth exploring. while we have seen number of listings s

mr. carlson, and i thank you for the opportunity, it is a personal issue for me.parents brought me here undocumented as a child. i was 14. and what i can tell you is that, when i came here, it wasn't my choice, but i made a point of trying to be a productive member -- >> tucker: i don't want to be rude. i think you have done great. i think that's great. i'm not attacking you personally. there are a lot of immigrants like you who are impressive. but there are also 330 million americans who are already citizens, and i think it is fair to ask, what effect does this have on them. if you study the effect of immigration on your county, and if you haven't, and i know you haven't, i wanted to tell me why you haven't. >> we believe that the immigrants that are part of our county are an asset to our county. >> tucker: but do you know that? have you studied that? what would you study that? rather than just gas? -- guess? >> if you look at the contributions that immigrants make on a daily basis, businesses -- >> tucker: it looks like it -- >> status have been made for jurisdi

mr. carlson, thanks for being with us.u just said the wireless business is more the responsibility of charlie, you referred to, but can you give us any sense here in it erms of the plans the company has overall at this point to do something with all of that spectrum you have amassed over the last years and need to start to put to commercial use >> sure, david i think when we talk about the wireless business, that is progressing nicely it is charlie's focus. i think we both have a bit of a new job here in the last month, and my job is really pay tv, and charlie's is to focus in on that wireless business. and he's putting together a team to really move our position forward with wireless. so far, what we have announced is obviously we're going to build a narrow band iot network by march of 2020 so more to come on that. >> to julia's question as well, on sling tv, we had the proliferation of so many of these over the top platforms in fact, recently, i have learned about this thing called offer surfing, where people take advant