Complex sentence: Agnew attended Farringdon Community Academy and upon leaving joined Sunderland's Youth Academy he made his first professional appearance for the club on 4 February 2015, appearing as a late substitute in a 3--1 FA Cup victory over Fulham.
Split into simpler sentences: Agnew attended Farringdon Community Academy and upon leaving joined Sunderland's Youth Academy. He made his first professional appearance for the club on 4 February 2015, appearing as a late substitute in a 3--1 FA Cup victory over Fulham.