Session 14 (Nara, 16 January 2015)	14	2015-01-16
Session 15 (London, 6 March 2015)	15	2015-03-06
Session 16 (Berlin, 19 June 2015)	16	2015-06-19
Session 17 (Brussels, 11 September 2015)	17	2015-09-11
Session 18 (Geneva, 6 November 2015)	18	2015-11-06