Complex sentence: It runs between Chennai Egmore and Rameswaram via Tiruchirapalli, calling also at Chengalpattu, Villupuram, Cuddalore, Chidambaram, Kumbakonam, Thanjavur, Pudukkottai, Karaikkudi, Sivagangai and Ramanathapuram.
Split into simpler sentences: It runs between Chennai Egmore and Rameswaram via Tiruchirapalli. The main towns on the way are Chengalpattu, Villupuram, Cuddalore, Chidambaram, Kumbakonam, Thanjavur, Tiruchirapalli, Pudukkottai, Karaikkudi, Sivagangai and Ramanathapuram.