how many russians lived in south ossetia in 1970 ?
CREATE TABLE table_204_257 (
    id number,
    "ethnicity" text,
    "1926 census" text,
    "1939 census" text,
    "1959 census" text,
    "1970 census" text,
    "1979 census" text,
    "1989 census" text,
    "2007 estimate" text
)
SELECT "1970 census" FROM table_204_257 WHERE "ethnicity" = 'russians'
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: how many russians lived in south ossetia in 1970 ? ### Input: CREATE TABLE table_204_257 (
    id number,
    "ethnicity" text,
    "1926 census" text,
    "1939 census" text,
    "1959 census" text,
    "1970 census" text,
    "1979 census" text,
    "1989 census" text,
    "2007 estimate" text
) ### Response: SELECT "1970 census" FROM table_204_257 WHERE "ethnicity" = 'russians'