Complex sentence: After the first passenger train service was inaugurated between Bombay and Thane, this was the second railway line opened from Allahabad to Kanpur (180 km) on March 3,1859, which was the first passenger railway line in North India.
Split into simpler sentences: After the first passenger train service was inaugurated between Bombay and Thane. This was the second railway line opened from Allahabad to Kanpur (180 km) on March 3,1859 which was the first passenger railway line in North India.