Complex sentence: Simonsen grew up a supporter of Sunderland and was spotted by Nottingham Forest at the age of 15 whilst playing in South Shields, however he was released in the summer of 1996.
Split into simpler sentences: Simonsen grew up a supporter of Sunderland but was spotted by Nottingham Forest at the age of 15 whilst playing in his native South Shields. After a spell in Nottinghamshire however he was released in the summer of 1996.