Context : Cholamandalam MS General Insurance Company Ltd (Chola MS) is an Indian assurance firm and a joint venture between the Murugappa Group, an Indian conglomerate, and the Mitsui Sumitomo Insurance Group (MSIG), a Japanese assurance company. 
Subject : Cholamandalam MS General Insurance 
Relation : parent company
What is Cholamandalam MS General Insurance's parent company?