Table: caribou_records_discography
Columns: artist
album
country
year
catalog
format

Question: What is the format of the album Pacific Ocean Blue in 1991?
SQL: SELECT "format" FROM caribou_records_discography WHERE "album" = 'pacific ocean blue' AND "year" = 1991

Question: Who is the artist with catalog number ZK 34354?
SQL: SELECT "artist" FROM caribou_records_discography WHERE "catalog" = 'zk 34354'