Question: What is the estimated end date for the 2001-037a international designated satellite?
Schema: create table table_18161217_2 (estimated_end_date varchar, _clarification_needed_ varchar, cospar_id varchar, PRIMARY KEY (estimated_end_date))
SQL: select estimated_end_date[_clarification_needed_] from table_18161217_2 where cospar_id = "2001-037a"