Generate a sentence that describes the following data: A.C. Milan, league, Serie A; Alessio Romagnoli, club, A.C. Milan; A.C. Milan, manager, Siniša Mihajlović; Alessio Romagnoli, club, Italy national under-16 football team.
Sentence:
Alessio Romagnoli who played for the Italy national under-16 football team, is a member of AC Milan who are in the Serie A league and managed by Sinisa Mihajlovic.