Complex sentence: On November 16,1936 Paul E. Richter headed the airline's Boeing 307 talks; on January 29,1937 TWA contracted with Boeing for five Boeing 307 "Stratoliners," the first commercial plane with a pressurized cabin.
Split into simpler sentences: On November 16,1936, Paul E. Richter headed the airline's Boeing 307 talks. On January 29,1937, TWA contracted with Boeing for five Boeing 307 "Stratoliners," the first commercial plane with a pressurized cabin.