sentences:  The program is designed to proactively engage residents from each city that it visits, and participants on the Internet and from around the world, in free programs and experiments, and to address ideas and issues of urban living with particular relevance to each city.The Lab's Advisory Committee of experts nominates each city's lab team, an interdisciplinary group that creates the programming for that location.The lab was expected to visit nine cities for three months each over the course of six years, with three different structures housing the lab, each of which was to travel to three cities.