Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_14578 ( "Pos." text, "Player" text, "Team" text, "Height" text, "Weight" real, "First round" real, "Final round" text )

### Question ###
What is the average first round for Utah Jazz team, with a weight smaller than 229?

### Accurate SQL ###

SELECT AVG("First round") FROM table_14578 WHERE "Weight" < '229' AND "Team" = 'utah jazz'