Table: interregional_primary_plan
Columns: region
group_a
group_b
group_c
group_d
group_e
group_f

Question: What is the group B region with a Group E region of Georgia?
SQL: SELECT "group_b" FROM interregional_primary_plan WHERE "group_e" = 'georgia'

Question: What is the group A region with a region number of 2?
SQL: SELECT "group_a" FROM interregional_primary_plan WHERE "region" = 2

Question: What is the group C region with Illinois as group B?
SQL: SELECT "group_c" FROM interregional_primary_plan WHERE "group_b" = 'illinois'