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_81 ( _number_of_candidates INTEGER, general_election VARCHAR, result VARCHAR, _number_of_seats_won VARCHAR )

### Question ###
What is the # of candidates of liberal majority with 51 wins and larger number of 2008 in general elections?

### Accurate SQL ###

SELECT AVG(_number_of_candidates) FROM table_name_81 WHERE result = "liberal majority" AND _number_of_seats_won = 51 AND general_election > 2008