user: Question: What was the signed year for the Chinese name 蘇永康 who separated in 1987?
Columns: ['English name', 'Chinese name', 'Year signed', 'Year separated', 'Reason for separation']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Bill Chan', '石修', 1971.0, '[Unknown]', '†']
SQL:

assistant: SELECT "Year signed" FROM "Table" WHERE "Year separated" = '1987' AND "Chinese name" = '蘇永康';