Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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

### Accurate SQL ###

SELECT real_life_years_of_operation FROM table_243664_1 WHERE currently¹_part_of = "Amtrak"