Complex sentence: Lake was obsessed with the hippie lifestyle in San Francisco and became increasingly obsessed with the idea of an impending nuclear holocaust, and for 8 years he lived in a hippie commune near Ukiah, in northern California.
Split into simpler sentences: Lake was obsessed with the hippie lifestyle in San Francisco and increasingly with the idea of an impending nuclear holocaust. For 8 years, he lived in a hippie commune near Ukiah in northern California.