Table: nordic_athletics_schools
Columns: school
location
mascot
county
joined
previous_conference
left
conference_joined

Question: When doeas Mascot of blue devils in Gary Froebel School?
SQL: SELECT "joined" FROM nordic_athletics_schools WHERE "mascot" = 'blue devils'

Question: Which conference held at School of whiting?
SQL: SELECT "previous_conference" FROM nordic_athletics_schools WHERE "school" = 'whiting'