Complex sentence: The first rail lines in Guntur are of Metre Gauge during the early 20th century, between Guntur and Hubli/Goa.Later a Broad Gauge rail line was built between GNT/VJA towards Howrah with the completion of Prakasam Barrage on the River Krishna.
Split into simpler sentences: The first rail lines in Guntur are of Metre Gauge during the early 20th century, between Guntur and Hubli/Goa. Later, a Broad Gauge rail line was built between Guntur-Vijayawada towards Howrah with the completion of Prakasam Barrage on the River Krishna.