How many winners from previous round were there in the semi finals?
CREATE TABLE table_30234 (
    "Round" text,
    "Clubs remaining" real,
    "Clubs involved" real,
    "Winners from previous round" text,
    "New entries this round" text,
    "Leagues entering at this round" text
)
SELECT "Winners from previous round" FROM table_30234 WHERE "Round" = 'Semi finals'
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 winners from previous round were there in the semi finals? ### Input: CREATE TABLE table_30234 (
    "Round" text,
    "Clubs remaining" real,
    "Clubs involved" real,
    "Winners from previous round" text,
    "New entries this round" text,
    "Leagues entering at this round" text
) ### Response: SELECT "Winners from previous round" FROM table_30234 WHERE "Round" = 'Semi finals'