Complex sentence: It was formed as part of the KCG Group which was headed by the Kyoto Computer Gakuin (KCG), founded in 1963 by Yasuko and Shigeo Hasegawa.
Split into simpler sentences: It was formed as part of the KCG Group which was headed by the Kyoto Computer Gakuin (KCG). KCG was founded in 1963 by Yasuko and Shigeo Hasegawa.