Complex sentence: The stadium was named the "Arena Corinthians" by Corinthians before construction began in August 2010, and attempts to nickname it have been made by the local media, although none have been widely accepted.
Split into simpler sentences: The stadium was named the "Arena Corinthians" by Corinthians before construction began in August 2010. Attempts to nickname it have been made by the local media, although none have been widely accepted.