user: Question: In what Year did the German Open have Yoo Sang-hee as Partner?
Columns: ['Outcome', 'Event', 'Year', 'Venue', 'Partner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['World Championships', 'World Championships', 'World Championships', 'World Championships', 'World Championships']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Partner" = 'Yoo Sang-hee' AND "Venue" = 'German Open';