CREATE TABLE table_name_95 (tenure VARCHAR2, cause_of_death VARCHAR2, badge_serial_number VARCHAR2)

What is the Tenure of the Officer who died in a helicopter accident with Badge/Serial Number 16805?
SELECT tenure FROM table_name_95 WHERE cause_of_death = "helicopter accident" AND badge_serial_number = "16805"
SELECT "tenure" FROM "table_name_95" WHERE "16805" = "badge_serial_number" AND "cause_of_death" = "helicopter accident"