Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
WHAT IS AN AVERAGE ELECTORATE WITH VOTES OF 28,475 AND SPOILT SMALLER THAN 5,779?

### Inputs:
table_name: table, columns: ['Constituency', 'Electorate', 'Votes', 'Turnout', 'Spoilt', 'Percent Yes']

### Response:
SELECT AVG Electorate FROM table WHERE Votes = 28,475 AND Spoilt < 5,779