Complex sentence: After his California sojourn, Hooker returned to Chicago and performed regularly around the city, including the first Chicago Blues Festival on August 30,1969, which attracted about 10,000 people.
Split into simpler sentences: After his California sojourn, Hooker returned to Chicago and performed regularly around the city. He appeared at the first Chicago Blues Festival on August 30,1969, which attracted about 10,000 people.