Table schema:
CREATE TABLE table_name_97 (length_feet VARCHAR, length_meters VARCHAR, parish VARCHAR, km_from_kingston VARCHAR)

Question: What is the total number of Length Feet, when Parish is Clarendon, when Km From Kingston is 71.2, and when Length Meters is less than 21.3?
SQL: SELECT COUNT(length_feet) FROM table_name_97 WHERE parish = "clarendon" AND km_from_kingston = 71.2 AND length_meters < 21.3