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.

Barrick will deliver silver to RGLD Gold in amounts equal to 75% of Barrick’s interest in the silver produced at the Pueblo Viejo mine beginning on January 1, 2016 until 50.00 million ounces of silver have been delivered, and 37.50% of Barrick’s interest in silver produced thereafter.

Answer: product_or_material_produced: Pueblo Viejo mine, Gold