Complex sentence: A total of 24 teams, including five reserve sides from top-tier Primeira Liga teams, contest this competition, which began on 7 August 2015 and is scheduled to end on 14 May 2016.
Split into simpler sentences: A total of 24 teams compete in this division, including five reserve sides from top-flight Primeira Liga teams. The season began on 7 August 2015 and is scheduled to end on 14 May 2016.