Who was the aggressive rider when the sprint classification was andr greipel and mountains classification was timothy roe?
CREATE TABLE table_27789 (
    "Stage" real,
    "Winner" text,
    "General Classification" text,
    "Mountains Classification" text,
    "Sprint Classification" text,
    "Young Rider Classification" text,
    "Team Classification" text,
    "Aggressive Rider" text
)
SELECT "Aggressive Rider" FROM table_27789 WHERE "Sprint Classification" = 'André Greipel' AND "Mountains Classification" = 'Timothy Roe'
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 the aggressive rider when the sprint classification was andr greipel and mountains classification was timothy roe? ### Input: CREATE TABLE table_27789 (
    "Stage" real,
    "Winner" text,
    "General Classification" text,
    "Mountains Classification" text,
    "Sprint Classification" text,
    "Young Rider Classification" text,
    "Team Classification" text,
    "Aggressive Rider" text
) ### Response: SELECT "Aggressive Rider" FROM table_27789 WHERE "Sprint Classification" = 'André Greipel' AND "Mountains Classification" = 'Timothy Roe'