John Alexander is the uncle of an English professional footballer who made his senior debut in what year?
Trent Alexander-Arnold: Trent John Alexander-Arnold (born 7 October 1998) is an English professional footballer who plays as a right-back for Premier League club Liverpool. Trent Alexander-Arnold:  He is an academy graduate of Liverpool and made his senior debut for the club in 2016, aged 18.
i don't know