What is the average words of the 10 fewest words title?
average words = avg(words); 10 fewest words refers to words > = 10
SELECT CAST(SUM(CASE WHEN words >= 10 THEN words ELSE 0 END) AS REAL) / SUM(CASE WHEN words >= 10 THEN 1 ELSE 0 END) FROM pages
database name:db_id language_corpus
langs table langs Cols: language id dtype integer, language dtype text, locale dtype text, pages dtype integer, words dtype integer, 
pages table pages Cols: page id dtype integer, language id dtype integer, page dtype integer, revision dtype integer, title dtype text, words dtype integer, 
words table words Cols: word id dtype integer, word dtype text, occurrences dtype integer, 
langs_words table langs_words Cols: language id dtype integer, word id dtype integer, occurrences dtype integer, 
pages_words table pages_words Cols: page id dtype integer, word id dtype integer, occurrences dtype integer, 
biwords table biwords Cols: language id dtype integer, word id of the first word dtype integer, word id of the second word dtype integer, occurrences dtype integer, 
