Complex sentence: The Santa Fe introduced the new streamliner on June 6,1954; it was Santa Fe's last new streamliner and its first direct service from Chicago to the San Francisco Bay Area.
Split into simpler sentences: The Santa Fe introduced the new streamliner on June 6,1954; it would be the last new streamliner the company introduced. It was the Santa Fe's first direct service from Chicago to the San Francisco Bay Area.