What is the relationship between WSO2 and middleware 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.

View the full release here: http://www.businesswire.com/news/home/20150824005638/en/ Dilip Rahulan, Executive Chairman of Pacific Control Systems (Photo: ME NewsWire) Joined by Toba Capital, a venture firm focused on enterprise software and infrastructure, the investment will support WSO2 to meet increasing demand from professional developers for its comprehensive, open source middleware platform.

Answer: industry