Complex sentence: In the decade before television became widespread, thousands of flights were undertaken for Pepsi-Cola (2225 in 1940 alone), driving huge brand growth into the mid- 1940s and a relationship with the Skywriting Corporation of America that lasted over 60 years.
Split into simpler sentences: In the decade before television became widespread, thousands of flights were undertaken for Pepsi-Cola (2225 in 1940 alone),. This relationship with the Skywriting Corporation of America that lasted over 60 years.