“…Data from smart city infrastructure [16,19,25,[29][30][31]48,49,52] Data provided by sensors inside vehicles [28,51] Data provided by video cameras [50,56] Data provided by gas sensors [37] Geo-tagged social media data [34][35][36]56] Data collected by online questionnaire [17,33] Data provided by lifestyle monitoring devices: Location [16,21,30,31,39,40,43,45,[48][49][50]55] Activity [18,20,24,31,41,42,48,49 [47] Finally, two articles reported on the use of social media [38,60] and one article, [22], reported on the development of an ambulance robot equipped with an AED. Using multiple sensors for navigation (vision and range sensors) this robot might be able to navigate from a point to a given destination without losing the correct path or hitting obstacles [22].…”