Table: oil_1988_season
Columns: date
visitor
score
home
record

Question: Who is the home team of the game on December 21?
SQL: SELECT "home" FROM oil_1988_season WHERE "date" = 'december 21'

Question: Who is the visitor of the game on March 7?
SQL: SELECT "visitor" FROM oil_1988_season WHERE "date" = 'march 7'