Complex sentence: On 5 December 2002 airport improved accessibility with the beginning of construction of the Sendai Airport Line rail link which was completed on 18 March 2007, and began service between Sendai Station and Sendai Airport Station.
Split into simpler sentences: On 5 December 2002 airport improved accessibility with the beginning of construction of the Sendai Airport Line. The construction of the the rail link was completed on 18 March 2007 and the rail link began service between Sendai Station to Sendai Airport Station.