Question: When rudolph kleberg (d) is the successor what is the date of successors taking office?
Schema: create table table_2417445_4 (date_of_successors_taking_office varchar, successor varchar, PRIMARY KEY (date_of_successors_taking_office))
SQL: select date_of_successors_taking_office from table_2417445_4 where successor = "rudolph kleberg (d)"