Utilize the input text as a context reference, choose the right relationship between 'Alcoa' and 'aluminium' from the options.
Options: subsidiary, parent organization, product/material produced, developer

Alcoa (NYSE: AA - news ) rose 2.98% after the aluminium giant unveiled plans to split into two separate companies, while Kellogg (Hamburg: 944624.HM - news ) slid 0.66% after saying it would buy Egypt-based Mass Food Group in a deal worth approximately $150m.
product/material produced