Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_17 (Id VARCHAR)
### Question:
What is the 1986 value with A in 1991 and A in 1987?
### Answer:
SELECT 1986 FROM table_name_17 WHERE 1991 = "a" AND 1987 = "a"