SELECT First_year ,  Last_year FROM party WHERE Party_Theme  =  "Spring" OR Party_Theme  =  "Teqnology"
Show the first year and last year of parties with theme "Spring" or "Teqnology".
[Schema (values) (types)]: | party_host |  party : party_id (text) , party_theme (number) , location (text) , first_year (text) , last_year (text) , number_of_hosts (text) | host : host_id (text) , name (number) , nationality (text) , age (text) | party_host : party_id (text) , host_id (number) , is_main_in_charge (text);