user: Question: What is the year that the oldest church was built in Jostedal? 
Columns: ['Parish (Prestegjeld)', 'Sub-Parish (Sogn)', 'Church Name', 'Year Built', 'Location of the Church']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Hafslo Parish', 'Hafslo', 'Hafslo kyrkje', 1878.0, 'Hafslo']
SQL:

assistant: SELECT "Year Built" FROM "Table" WHERE "Location of the Church" = 'Jostedal';