Table: violent_events_2
Columns: low_estimate
high_estimate
type
location
date

Question: 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?
SQL: SELECT SUM("high_estimate") FROM violent_events_2 WHERE "type" = 'mass suicide' AND "location" = 'france' AND "low_estimate" > 16

Question: What is the sum of low estimate(s) that is listed for the date of 1978?
SQL: SELECT SUM("low_estimate") FROM violent_events_2 WHERE "date" = '1978'