(1) On which exact dates did he visit the Russian Federation in May 2015?
(2) (a) how many government officials accompanied him on the specified visit, (b) what are the names of all non-government employees and persons who accompanied him on the specified visit and (c) what was the total cost of (i) flights, (ii) accommodation, (iii) travel within the Russian Federation and/or (iv) entertainment of the entire delegation during the specified visit?