Bill Hefner อยู่ในเขตใด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
To what district does Bill Hefner belong?It is not neccessary to use all the tables.
 table_18197:  "District" [ text]  "Incumbent" [ text]  "Party" [ text]  "Status" [ text]  "Opponent" [ text] 
SELECT "District" FROM table_18197 WHERE "Incumbent" = 'Bill Hefner'