What is Years, when Nationality is United States, and when Position is PG / SG?
CREATE TABLE table_name_83 (
    years VARCHAR,
    nationality VARCHAR,
    position VARCHAR
)
SELECT years FROM table_name_83 WHERE nationality = "united states" AND position = "pg / sg"
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 Years, when Nationality is United States, and when Position is PG / SG? ### Input: CREATE TABLE table_name_83 (
    years VARCHAR,
    nationality VARCHAR,
    position VARCHAR
) ### Response: SELECT years FROM table_name_83 WHERE nationality = "united states" AND position = "pg / sg"