Name the opponent for jul 31 and score of w 5-1
CREATE TABLE table_15641 (
    "Date" text,
    "Opponent" text,
    "Score" text,
    "Loss" text,
    "Crowd" text,
    "Record" text
)
SELECT "Opponent" FROM table_15641 WHERE "Date" = 'jul 31' AND "Score" = 'w 5-1'
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: Name the opponent for jul 31 and score of w 5-1 ### Input: CREATE TABLE table_15641 (
    "Date" text,
    "Opponent" text,
    "Score" text,
    "Loss" text,
    "Crowd" text,
    "Record" text
) ### Response: SELECT "Opponent" FROM table_15641 WHERE "Date" = 'jul 31' AND "Score" = 'w 5-1'