Complex sentence: Johnson's first session in San Antonio, Texas lasted three days, on the 23rd, 26th, and 27th of November 1936, sixteen songs were recorded in the Gunter Hotel, where ARC had set up equipment to record a number of musical acts.
Split into simpler sentences: Johnson's first session in San Antonio, Texas lasted three days. Sixteen songs were recorded in the Gunter Hotel, where ARC had set up equipment to record a number of musical acts.