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.

Hard-disk drive maker Western Digital Corp will buy SanDisk Corp in a $19 billion that will greatly increase its ability to make flash memory storage chips used in smartphones and tablets.

Answer: owned_by: SanDisk, Western Digital; owner_of: Western Digital, SanDisk; parent_organization: SanDisk, Western Digital; subsidiary: Western Digital, SanDisk