Complex sentence: In 2004, Batzarre was one of the founding parties of the coalition "Nafarroa Bai" (Yes to Navarre), who earned them a seat in the Parliament of Navarre, held by Ioseba Eceolaza.
Split into simpler sentences: In 2004, Batzarre was one of the founding parties of the coalition "Nafarroa Bai" (Yes to Navarre). It obtained a seat in the Parliament of Navarre, elected on the Nafarroa Bai list, held by Ioseba Eceolaza.