Original sentence: "  The Republic of Venice sources refer to Narentines as to Slavs.The Narentines (Neretljani) were named by their land, Neretvia, which was named by its neighbouring river.The region has also be referred to as being part of Red Croatia.They were also referred to as Neretljani Croatians
Edited sentence: "  The Republic of Venice sources refer to Narentines as to Serbs.The Narentines (Neretljani) were named after their land of Neretvia, which was named after its neighboring river Neretva