user: Question: When was laurent-marie-joseph imbert / st. imbert, who was beatified after 1909 and canonised after 1984, martyred?
Columns: ['Name', 'Martyred', 'Place', 'Beatified', 'Canonised']
Types: ['text', 'real', 'text', 'real', 'real']
Sample row: ['Laurent-Marie-Joseph Imbert / St. Imbert', 1839.0, 'Korea', 1925.0, 1984.0]
SQL:

assistant: SELECT "Martyred" FROM "Table" WHERE "Beatified" > 1909.0 AND "Name" = 'laurent-marie-joseph imbert / st. imbert' AND "Canonised" > 1984.0;