Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Having dominated the commodity milk powder sector for years, Fonterra is aiming to deliver more food services and specialised ingredients in China, its biggest market, and in other emerging countries where it expects demand for dairy products will grow in the long term.

Answer: product_or_material_produced: Fonterra, milk