Table: pittsburgh_penguins_1992_93_2
Columns: date
visitor
score
home
record

Question: Who was the visitor in the game that led to a 39-20-6 record?
SQL: SELECT "visitor" FROM pittsburgh_penguins_1992_93_2 WHERE "record" = '39-20-6'

Question: What was the date of the game that led to a 48-21-6 record?
SQL: SELECT "date" FROM pittsburgh_penguins_1992_93_2 WHERE "record" = '48-21-6'