SELECT DISTINCT T2.pilot FROM airport AS T1 JOIN flight AS T2 ON T1.id = T2.airport_id WHERE T1.country = 'United States' OR T1.name = 'Billund Airport'
Apa nama pilot berbeda yang telah mengujicobakan penerbangan di negara 'Amerika Serikat' atau di bandara bernama 'Bandara Billund'?
CREATE TABLE airport (id VARCHAR, country VARCHAR, name VARCHAR); CREATE TABLE flight (pilot VARCHAR, airport_id VARCHAR)