user: Question: Who is the perpetrator in Uganda who killed 12 in Kampala?
Columns: ['Perpetrator', 'Year', 'Location', 'Country', 'Killed']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Unek, William', '1954 1957', 'Mahagi Malampaka', 'Belgian Congo Tanganyika', '21 36']
SQL:

assistant: SELECT "Perpetrator" FROM "Table" WHERE "Country" = 'Uganda' AND "Location" = 'Kampala' AND "Killed" = '12';