What is the relationship between Western Digital and SanDisk in the context of the input sentence. Choose an answer from: 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.

Meanwhile, more consolidation in the chip-making industry : Western Digital ( WDC ) said on Wednesday it has plans to buy chipmaker SanDisk ( SNDK ) in a deal valued at about $19 billion.

Answer: subsidiary