CREATE TABLE table_3006 ("District" CLOB, "Vacator" CLOB, "Reason for change" CLOB, "Successor" CLOB, "Date successor seated" CLOB)

When was successor George E. Harris (R) seated?
SELECT "Date successor seated" FROM table_3006 WHERE "Successor" = 'George E. Harris (R)'
SELECT "Date successor seated" FROM "table_3006" WHERE "Successor" = 'George E. Harris (R)'