user: Question: Who won the mens doubles the year Alison Humby won the womens singles?
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1974.0, 'Hermann Fröhlich', 'Monika Cassens', 'Gregor Berden Stane Koprivsek', 'Monika Cassens Christine Zierath', 'Joachim Schimpke Monika Cassens']
SQL:

assistant: SELECT "Mens doubles" FROM "Table" WHERE "Womens singles" = 'Alison Humby';