What is the relationship between 'Boeing Capital' and 'Boeing' in the context of the input sentence.
Options: parent organization, owned by, position held, employer

Boeing Capital Corp. (IDR A) does not have an order book, but serves as a contingent financing source for Boeing customers, suggesting they too could have an increased funding burden under the scenario whereby airlines do not have access to capital markets or Ex-Im funding to finance aircraft purchases.
parent organization