What is the relationship between Twitter and microblogging 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.

(Reuters) - The National Football League said it signed a multiyear partnership with microblogging site Twitter Inc to deliver video and other content to NFL fans on a daily basis.

Answer: product_or_material_produced