SCHEMA:
CREATE TABLE table_name_51 (high_estimate INTEGER, low_estimate VARCHAR, type VARCHAR, location VARCHAR)
USER:
With a type of mass suicide located in France and a low estimate greater than 16, the sum of the high estimate numbers listed is what number?

QUERY:
SELECT SUM(high_estimate) FROM table_name_51 WHERE type = "mass suicide" AND location = "france" AND low_estimate > 16