user: Question: Can you tell me the average Chapter that has Articles smaller than 15?
Columns: ['Chapter', 'Chinese', 'Pinyin', 'English Translation', 'Articles']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, '道化', 'Daohua', 'Way Transformations', 24.0]
SQL:

assistant: SELECT AVG("Chapter") FROM "Table" WHERE "Articles" < 15.0;