Who was her partner at the US Open and they were runner-up?
CREATE TABLE table_22873 (
    "Outcome" text,
    "Year" real,
    "Championship" text,
    "Surface" text,
    "Partner" text,
    "Opponents" text,
    "Score" text
)
SELECT "Partner" FROM table_22873 WHERE "Outcome" = 'Runner-up' AND "Championship" = 'US Open'
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 was her partner at the US Open and they were runner-up? ### Input: CREATE TABLE table_22873 (
    "Outcome" text,
    "Year" real,
    "Championship" text,
    "Surface" text,
    "Partner" text,
    "Opponents" text,
    "Score" text
) ### Response: SELECT "Partner" FROM table_22873 WHERE "Outcome" = 'Runner-up' AND "Championship" = 'US Open'