A table "Titanic_passengers" that stores info about the passengers of the Titanic has the following columns:
- integer passenger_id
- boolean survived
- integer passenger_class
- varchar(20) first_name
- varchar(20) last_name
- boolean is_male
- integer age (in 1912)
- integer sibsp (number of siblings/spouses aboard)
- integer parch (number of parents/children aboard)
Write a query that selects all the info about each passenger. Sort the results by the number of relatives aboard (large families should go first).