Complex sentence: On 29 August 2012 Stockdale became a youth team coach of Premier League side Sunderland, in return Sunderland offered to take their first team squad for a pre-season friendly at Grimsby for the following summer.
Split into simpler sentences: On 29 August 2012 Stockdale became a youth team coach of Premier League side Sunderland. In return Sunderland offered to take their first team squad for a pre-season friendly at Grimsby for the following summer.