Refer to the input text as context and select the correct relationship between 'Nucor' and 'Steel' from the available options.
Options: chairperson, headquarters location, product/material produced, creator

I want to take a moment to recognize Nucor Steel Arkansas and Nucor Castrip Arkansas, for going more than one year without a recordable injury, an impressive accomplishment for one of our larger more complex steel mills.
product/material produced