SCHEMA:
CREATE TABLE table_name_18 (played INTEGER, lost VARCHAR, goals_against VARCHAR, team VARCHAR)
USER:
What is the average Played, when Goals Against is less than 63, when Team is "Nelson", and when Lost is greater than 16?

QUERY:
SELECT AVG(played) FROM table_name_18 WHERE goals_against < 63 AND team = "nelson" AND lost > 16