Table: eastern_wu_regions
Columns: province
provincial_capital
commandery
commandery_capital
no_of_counties

Question: when changsha 長沙 is the commandery what is the commandery capital?
SQL: SELECT "commandery_capital" FROM eastern_wu_regions WHERE "commandery" = 'Changsha 長沙'

Question: When yidu 宜都 is the commandery what is the lowest number of countries?
SQL: SELECT MIN("no_of_counties") FROM eastern_wu_regions WHERE "commandery" = 'Yidu 宜都'

Question: When nanhai 南海 is the commandery what is the commandery capital?
SQL: SELECT "commandery_capital" FROM eastern_wu_regions WHERE "commandery" = 'Nanhai 南海'

Question: When zhang'an county 章安縣 is the commandery capital what is the province?
SQL: SELECT "province" FROM eastern_wu_regions WHERE "commandery_capital" = 'Zhang''an County 章安縣'

Question: When gaoliang 高涼 is the commandery what is the commandery capital?
SQL: SELECT "commandery_capital" FROM eastern_wu_regions WHERE "commandery" = 'Gaoliang 高涼'