What is the date when the tournament is san diego and the opponent is ann grossman?
CREATE TABLE table_13673 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent" text,
    "Score" text
)
SELECT "Date" FROM table_13673 WHERE "Tournament" = 'san diego' AND "Opponent" = 'ann grossman'
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: What is the date when the tournament is san diego and the opponent is ann grossman? ### Input: CREATE TABLE table_13673 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent" text,
    "Score" text
) ### Response: SELECT "Date" FROM table_13673 WHERE "Tournament" = 'san diego' AND "Opponent" = 'ann grossman'