What is the relationship between 'Peterbilt' and 'Paccar' in the context of the input sentence.
Options: position held, member of, stock exchange, owned by

Class 8 Used Truck Volumes Flat in July, ACT Research August 27, 2015, 07:00 AM Related: ACT Research , Class 8 , Daimler , Freightliner , Kenworth , Mack , Navistar , Paccar , Peterbilt , Trucks , Used Equipment , Volvo
owned by