Complex sentence: Lumsdon began his career at Sunderland A.F.C and made his first team debut against Wolverhampton Wanderers on the 7th February 1998, in the same week he signed a 5-year professional contract, and was also called up to the England U18 squad.
Split into simpler sentences: Lumsdon began his career at Sunderland A.F.C and made his first team debut against Wolverhampton Wanderers on the 7th February 1998. In the same week he signed a 5-year professional contract, and was also called up to the England U18 squad.