CREATE TABLE table_20626 ("No." FLOAT, "Name" CLOB, "Mi from Kingston" CLOB, "Km from Kingston" CLOB, "Parish" CLOB, "Length feet" FLOAT, "Length meters" CLOB)

Which parishes have a railroad length of 51.8 meters?
SELECT "Parish" FROM table_20626 WHERE "Length meters" = '51.8'
SELECT "Parish" FROM "table_20626" WHERE "Length meters" = '51.8'