Task: Question Generation
Input (English): Context : Kawakita Denki Kigyosha (Japanese for ``Kawakita Electric Company''; commonly known as KDK), is the brand name used by Matsushita Ecology Systems Co., Ltd., a separate company of the Panasonic Corporation (formerly the Matsushita Electric Industrial Group) now Panasonic Ecology Systems Co. Ltd., to manufacture the group's ventilating products. 
Subject : KDK 
Relation : parent company
Output (English): Which company is the parent company of KDK?