https://medium.com/newco/a-guy-just-transcribed-30-years-of-for-rent-ads-heres-what-it-taught-us-about-sf-housing-prices-bd61fd0e4ef9#.b9har8cxv
https://medium.com/newco/a-guy-just-transcribed-30-years-of-for-rent-ads-heres-what-it-taught-us-about-sf-housing-prices-bd61fd0e4ef9#.b9har8cxv