Complex sentence: In 2009, Grupo Pegaso, the owners of Potros Chetumal, moves the team from Chetumal to Nezahualcóyotl to participate in the newly created Liga de Ascenso, additional to this, is known that they left the city with major pending bills.
Split into simpler sentences: In 2009, Grupo Pegaso, the owners of Potros Chetumal, moved the team from Chetumal to Nezahualcóyotl to participate in the newly created Liga de Ascenso. In addition to this, it is known that they left the city with major pending bills.