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

Question: Who is in group a when indiana is in group d?
SQL: SELECT "group_a" FROM interregional_plan WHERE "group_d" = 'Indiana'

Question: Who is in group a when indiana is in group d?
SQL: SELECT "group_a" FROM interregional_plan WHERE "group_d" = 'Indiana'

Question: Who is in group c when wisconsin is in group d?
SQL: SELECT "group_c" FROM interregional_plan WHERE "group_d" = 'Wisconsin'

Question: Who is in group c when iowa is in group e?
SQL: SELECT "group_c" FROM interregional_plan WHERE "group_e" = 'Iowa'