Complex sentence: Among the shows that brought in record audiences was "Disneyland", produced by and starring Walt Disney... the beginning of a relationship between the studio and the network which would eventually, four decades later, transform them both.
Split into simpler sentences: Among the shows that brought in record audiences was "Disneyland", produced by and starring Walt Disney. The beginning of a relationship between the studio and the network which would eventually, four decades later, transform them both.