human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Date, Airline, Aircraft type, Registration, People on board, Fatalities
###Question: How many fatalities are there for the airline of spantax, with a registration of ec-arz?
gpt
SELECT AVG Fatalities FROM table WHERE Airline = spantax AND Registration = ec-arz