Utilize the input text as a context reference, choose the right relationship between Pinterest and social media from the options. 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.

The company was building its presence on social media sites such as Facebook, Pinterest and Instagram, he said in a conference call.

Answer: industry