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_243664_1 (real_life_years_of_operation VARCHAR, currently¹_part_of VARCHAR)
### Question:
Name the real life years of operation for amtrak
### Answer:
SELECT real_life_years_of_operation FROM table_243664_1 WHERE currently¹_part_of = "Amtrak"