Robert Livingston ดำรงตำแหน่งกี่เขต?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many districts was Robert Livingston incumbent in?It is not neccessary to use all the tables.
 table_1341472_20:  (district [ VARCHAR ] incumbent [ VARCHAR) ]
SELECT COUNT(district) FROM table_1341472_20 WHERE incumbent = "Robert Livingston"