Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_91 (viewers INTEGER, share VARCHAR, rating VARCHAR, airdate VARCHAR)

### Question ###
Of all shows who have a rating larger than 7.8, aired on October 26, 2006, and has a share of over 14, what is the sum of the viewers?

### Accurate SQL ###

SELECT SUM(viewers) FROM table_name_91 WHERE rating > 7.8 AND airdate = "october 26, 2006" AND share > 14