What is the relationship between Pinterest and social media 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.

The social media website reported in July that its audience has grown to 1.49 billion users, dwarfing rivals Pinterest (31%) and Twitter (23%).

Answer: industry