What is the lowest expenditures on R&D for Poland after 2011?
CREATE TABLE table_63615 (
    "Rank" real,
    "Country/Region" text,
    "Expenditures on R&D (billions of US$ , PPP )" real,
    "% of GDP PPP" text,
    "Year" real
)
SELECT MIN("Expenditures on R&D (billions of US$ , PPP )") FROM table_63615 WHERE "Country/Region" = 'poland' AND "Year" > '2011'
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 lowest expenditures on R&D for Poland after 2011? ### Input: CREATE TABLE table_63615 (
    "Rank" real,
    "Country/Region" text,
    "Expenditures on R&D (billions of US$ , PPP )" real,
    "% of GDP PPP" text,
    "Year" real
) ### Response: SELECT MIN("Expenditures on R&D (billions of US$ , PPP )") FROM table_63615 WHERE "Country/Region" = 'poland' AND "Year" > '2011'