In the context of the input sentence, determine the relationship between 'Kenworth' and 'truck'.
Options: chairperson, distribution format, product/material produced, director/manager

In addition the report provides the average selling price for top-selling Class 8 models for each of the major truck OEMs – Freightliner (Daimler); Kenworth and Peterbilt (Paccar); International (Navistar); and Volvo and Mack (Volvo).
product/material produced