CREATE TABLE table_name_47 (date_of_death VARCHAR(255), name VARCHAR(255), cause_of_death VARCHAR(255), tenure VARCHAR(255))
What is gunfire victim Maria Cecilia Rosa with 6 years of Tenure Date of Death?
    
SQL: SELECT date_of_death FROM table_name_47 WHERE cause_of_death = "gunfire" AND tenure = "6 years" AND name = "maria cecilia rosa"