CREATE TABLE event (event_id DECIMAL, date TEXT, venue TEXT, name TEXT, event_attendance DECIMAL)
CREATE TABLE news_report (journalist_id DECIMAL, event_id DECIMAL, work_type TEXT)
CREATE TABLE journalist (journalist_id DECIMAL, name TEXT, nationality TEXT, age TEXT, years_working DECIMAL)

What is the average number of years spent working as a journalist?
SELECT AVG(years_working) FROM journalist
SELECT AVG("years_working") FROM "journalist"