Utilize the input text as a context reference, choose the right relationship between 'Norsk Hydro' and 'aluminium' from the options.
Options: publisher, product/material produced, operator, chairperson

Norwegian aluminium company Norsk Hydro ASA`s fully owned subsidiary, Hydro Aluminium Rolled Products GmbH , has secured a power contract with Axpo Trading AG, a Switzerland-based energy company with captive power production and international trading activity, totaling 0,9 TWh (100 MW) annually in the eight year period from 2018 to 2025.
product/material produced