user: Question: What is the location that has a date of demolition of 1940 and has a church named Christ Church Greyfriars?
Columns: ['Church name', 'Location', 'Rebuilt', 'Date of demolition', 'Subsuming parish']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['All Hallows Staining', 'Mark Lane', '1674', 1870.0, 'St Olave Hart Street']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Date of demolition" = 1940.0 AND "Church name" = 'Christ Church Greyfriars';