Complex sentence: In 1968, Hobbs studied diet and fasting with Paul Bragg in Desert Hot Springs, California, then took up experimenting with herbs from Maud Grieve's herbal and started leading weed walks in 1969.
Split into simpler sentences: In 1968, Hobbs studied diet and fasting with Paul Bragg in Desert Hot Springs, California. He took up experimenting with herbs from Maud Grieve's herbal and started leading weed walks in 1969.