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: What is the number of people on board at Iberia Airline, with the aircraft type of lockheed l-1049g?
gpt
SELECT AVG People on board FROM table WHERE Airline = iberia AND Aircraft type = lockheed l-1049g