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.

Let’s speed up spread of broadband by separating Openreach from BT Crown jewels miner Petra Diamonds loses its sparkle The precious gem producer has seen a sharp fall in sales and profits as weak Chinese demand has sent diamond prices lower Petra Diamonds unearthed the gem which now adorns the Sovereign's Sceptre, part of the British crown jewels collection.

Answer: industry: Petra Diamonds, diamond