Refer to the input text as context and select the correct relationship between 'Volvo' and 'truck' from the available options.
Options: industry, product/material produced, brand, publisher

And as Kai noted earlier, Daimler and Volvo have their own JV, just wondering if there's a concern that on this commercial truck hydrogen market, the OEMs might go in-house on some of the components related to hydrogen.
product/material produced