CREATE TABLE table_47988 ("Year" FLOAT, "Round" FLOAT, "Pick" FLOAT, "Player" CLOB, "NBA Club" CLOB)

What round was the player Ty Lawson with a pick earlier than 18?
SELECT AVG("Round") FROM table_47988 WHERE "Player" = 'ty lawson' AND "Pick" < '18'
SELECT AVG("Round") FROM "table_47988" WHERE "Pick" < '18' AND "Player" = 'ty lawson'