Planning a visit to Expo Milano 2015 or simply touring in Milan are activities that require a
certain amount of a priori knowledge of the city. In this paper, we present the process of
building such comprehensive knowledge bases that contain descriptions of events and
activities, places and sights, transportation facilities as well as social activities, collected from
numerous static, near-and real-time local and global data providers, including hyper local
sources such as the Expo Milano 2015 official services and several social media platforms …