CREATE TABLE table_40043 ("Chapter" FLOAT, "Chinese" CLOB, "Pinyin" CLOB, "English Translation" CLOB, "Articles" FLOAT)

Can you tell me the average Chapter that has Articles smaller than 15?
SELECT AVG("Chapter") FROM table_40043 WHERE "Articles" < '15'
SELECT AVG("Chapter") FROM "table_40043" WHERE "Articles" < '15'