Identify the type of derivative network relationship between: 

(a) CaO (Fm3m, a = 4.778 , 0 in 4a at 0 0 0, Ca in 4b at 2) and CaO (14/mmm, a = 3.56 , c = 5.95 , Ca in 2a at 0 0 0, 0 in 4e at 0 0 0.394), (b) SrMoO3 (Pm3m, a = 3.965 , Sr in 16 at /21/2 1/2, Mo in la at 0 0 0, O in 3d at /2 0 0) and the high-temperature SrFeMoO6 phase (Fm3m, a = 7.93 , Sr in 8c at 14 14 14, Mo in 4b at 2, Fe in 4a at 0 0 0, O in 24e at 0.253 0 0).