Choir: count active members born before 1980 (dd-mm-yyyy dates, inactive members and 1980 boundary present)…

Choir: count active members born before 1980 (dd-mm-yyyy dates, inactive members and 1980 boundary present)…: a task in agent-harbor-tasks (Harbor dataset). quanti soci attivi del coro sono nati prima del 1980? è tutto in soci coro.csv. scrivi solo il numero in risposta.txt