In order for a city to be smart, it needs the support of smart processing systems along with high quality data, as Chaesub Lee commented in an interview with Convergencialatina. In this regard, AI, which consists of two essential components: algorithms and data, is the essential tool to build and operate a smart city. The implementation of a comprehensive AI system still needs more efforts in various areas. What we could tackle first is, precisely, what we have right now, that is data. He strongly recommended to start with the classification of data because we do not know how much data we share and with who.