,room a,room b,room c,room d,room e
2013-12-12,,,,,
plenary 1,1001,,,,
talk 1,1002,1003,1004,1005,
talk 2,1006,1007,1008,1008,
tutorial 1,,,,,1017
2013-12-13,,,,,
talk 1,1009,1010,1011,1012,
talk 2,1013,1014,1015,1015,
tutorial 1,,,,,1016