When was the marriage of the person who died on 17 December 1471?
CREATE TABLE table_name_90 (marriage VARCHAR, death VARCHAR)
SELECT marriage FROM table_name_90 WHERE death = "17 december 1471"
### Context: CREATE TABLE table_name_90 (marriage VARCHAR, death VARCHAR) ### Question: When was the marriage of the person who died on 17 December 1471? ### Answer: SELECT marriage FROM table_name_90 WHERE death = "17 december 1471"