Complex sentence: The Jaguarão or Yaguarón River (Portuguese "Rio Jaguarão", Spanish "Río Yaguarón") forms the border between Uruguay and Rio Grande do Sul state in southernmost Brazil.
Split into simpler sentences: The Jaguarão or Yaguarón River (Portuguese "Rio Jaguarão", Spanish "Río Yaguarón") is a Brazilian and Uruguayan river. It forms the border between Uruguay and Rio Grande do Sul state in southernmost Brazil.