human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Name, Location, Act. Units, Stacks, In Service Dates, Unit Capacity (2009), Nameplate Capacity (2009 MW ), Owner Type, Owner(s) (2009)
###Question: Name the stacks for 1 1969 2 1995
gpt
SELECT Stacks FROM table WHERE In Service Dates = 1 1969 2 1995