Simplify the following text for a Grade 8 native English-speaking person.
Original: The DajabÃ n River ( also called Massacre River ) is a river of the Dominican Republic .
Simplified: The river Capotillo is part of the northern border between Haiti and the Dominican Republic until it joins the river DajabÃ n between the cities of Loma de Cabrera and DajabÃ n. Then the border follows the course of the river DajabÃ n.