user: Question: Name the became consort for Christian IX spouse
Columns: ['Name', 'Birth', 'Marriage', 'Became Consort', 'Ceased to be Consort', 'Spouse']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Louise of Hesse-Kassel', '7 September 1817', '26 May 1842', "15 November 1863 husband's ascession", '29 September 1898', 'Christian IX']
SQL:

assistant: SELECT "Became Consort" FROM "Table" WHERE "Spouse" = 'Christian IX';