human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Pick, Pos., Nationality, Team, Previous team, NBA years [a ], Career with the franchise [b ]
###Question: What is the previous team of the player with 4 NBA years and a pick less than 16?
gpt
SELECT Previous team FROM table WHERE NBA years [a ] = 4 AND Pick < 16