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.

Lehman Brothers LEH.N shares fell sharply on Monday on speculation that the investment bank could be bought for $15 a share, a price well below current market levels.

Answer: product_or_material_produced: Lehman Brothers, investment bank; industry: Lehman Brothers, investment