Who is the home team on 31 January 1951 when away team was Sheffield United?
CREATE TABLE table_50845 (
    "Tie no" text,
    "Home team" text,
    "Score" text,
    "Away team" text,
    "Date" text
)
SELECT "Home team" FROM table_50845 WHERE "Date" = '31 january 1951' AND "Away team" = 'sheffield united'
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: Who is the home team on 31 January 1951 when away team was Sheffield United? ### Input: CREATE TABLE table_50845 (
    "Tie no" text,
    "Home team" text,
    "Score" text,
    "Away team" text,
    "Date" text
) ### Response: SELECT "Home team" FROM table_50845 WHERE "Date" = '31 january 1951' AND "Away team" = 'sheffield united'