Utilize the input text as a context reference, choose the right relationship between Kenworth and PACCAR from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

PACCAR is simultaneously developing hydrogen fuel cell powered vehicles and has built 10 Kenworth T680s for customers in the Port of Los Angeles.

Answer: parent_organization