CREATE TABLE table_name_25 (nickname VARCHAR2, years_in_gfl VARCHAR2)

What is the nickname of the team who was in the GFL from 1986-1988?
SELECT nickname FROM table_name_25 WHERE years_in_gfl = "1986-1988"
SELECT "nickname" FROM "table_name_25" WHERE "1986-1988" = "years_in_gfl"