How many Wikipedia pages are there on the language of the biwords pair "àbac-xinès"?
àbac refers to word = 'àbac'; xinès refers to word = 'xinès'; Wikipedia pages refer to pages
SELECT COUNT(T1.pages) FROM langs AS T1 INNER JOIN biwords AS T2 ON T1.lid = T2.lid WHERE T2.w1st = ( SELECT wid FROM words WHERE word = 'àbac' ) AND T2.w2nd = ( SELECT wid FROM words WHERE word = 'xinès' )
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, 
