user: Question: What is the average election result for the province of grosseto from 1766 and prior?
Columns: ['Province', 'Inhabitants', 'established', 'President', 'Party', 'Election']
Types: ['text', 'real', 'real', 'text', 'text', 'real']
Sample row: ['Arezzo', 348327.0, 1826.0, 'Roberto Vasai', 'Democratic Party', 2009.0]
SQL:

assistant: SELECT AVG("Election") FROM "Table" WHERE "Province" = 'grosseto' AND "established" < 1766.0;