What is the total occurrence of the biwords pairs with "àbac" as its first word?
occurrence refers to occurrences; àbac refers to word = 'àbac'; first word refers to w1st
SELECT COUNT(T2.w1st) FROM words AS T1 INNER JOIN biwords AS T2 ON T1.wid = T2.w1st INNER JOIN words AS T3 ON T3.wid = T2.w2nd WHERE T1.word = 'àbac'