Given phrases that describe the relationship between two words/phrases as options, extract the word/phrase pair and the corresponding lexical relationship between them from the input text. The output format should be "relation1: word1, word2; relation2: word3, word4". Options: 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.

No new safety signals or data were presented at this year's ADA conference, but data was presented that confirmed the preservation and restoration of beta cell function as determined by C-peptide, which is a measure of a person's own insulin production.

Answer: product_or_material_produced: beta cell, insulin