Table: kaohsiung_districts_2
Columns: hanyu
tongyong
pe_h_e_j
chinese
area_km
no_of_villages
population_2010

Question: Where in Tongyong is Hanyu Sanmin?
SQL: SELECT "tongyong" FROM kaohsiung_districts_2 WHERE "hanyu" = 'sanmin'

Question: Which Hanya has an area of 19.3888?
SQL: SELECT "hanyu" FROM kaohsiung_districts_2 WHERE "area_km" = 19.3888