CREATE TABLE table_204_145 (id NUMBER, "representative" CLOB, "state" CLOB, "district ( s ) " CLOB, "served" CLOB, "party" CLOB, "date of birth" CLOB, "date of death" CLOB, "age" CLOB)

how many years did william r poage serve ?
SELECT "served" - "served" FROM table_204_145 WHERE "representative" = 'william r. poage'
SELECT "served" - "served" FROM "table_204_145" WHERE "representative" = 'william r. poage'