human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Name, Date of birth, Position(s), Seasons, Matches & (Goals) (League + Finals + KNVB-Cup), Previous club
###Question: What is the date of birth of the goalkeeper from the 1st season?
gpt
SELECT Date of birth FROM table WHERE Position(s) = goalkeeper AND Seasons = 1st