What is the earliest year borussia dortmund was west and bfc viktoria 1889 was Berlin?
CREATE TABLE table_51005 (
    "Year" real,
    "Nord" text,
    "West" text,
    "S\u00fcdwest" text,
    "Berlin" text
)
SELECT MIN("Year") FROM table_51005 WHERE "West" = 'borussia dortmund' AND "Berlin" = 'bfc viktoria 1889'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the earliest year borussia dortmund was west and bfc viktoria 1889 was Berlin? ### Input: CREATE TABLE table_51005 (
    "Year" real,
    "Nord" text,
    "West" text,
    "S\u00fcdwest" text,
    "Berlin" text
) ### Response: SELECT MIN("Year") FROM table_51005 WHERE "West" = 'borussia dortmund' AND "Berlin" = 'bfc viktoria 1889'