What is the relationship between 'New Flyer' and 'coach' in the context of the input sentence.
Options: legal form, location of formation, stock exchange, product/material produced

To achieve these goals of NFI Forward, we have launched multiple sub projects that include a back office administrative function of HR, legal finance and accounting, with a shared services model to efficiently support our business units, creating a combined MCI and New Flyer business unit focused on servicing public, bus and coach customers and private coach operators.
product/material produced