user: 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?
Columns: ['Name', 'Mi from Kingston', 'Km from Kingston', 'Parish', 'Length feet', 'Length meters']
Types: ['text', 'real', 'real', 'text', 'real', 'real']
Sample row: ['Scotts Pass', 44.25, 71.2, 'Clarendon', 70.0, 21.3]
SQL:

assistant: SELECT SUM("Length feet") FROM "Table" WHERE "Parish" = 'clarendon' AND "Km from Kingston" = 71.2 AND "Length meters" < 21.3;