Field reporters provide additional coverage of sporting events to complement the main reporter. They link to the studio by switching between live footage and the studio. Newsreaders are used to read syndicated news feeds and were originally used for online discussion groups before the internet. Reporters address viewers in a formal manner, often starting with "good evening." Interviews involve formal discussions between people to sell products, debate topics, or clarify issues. Experts and witnesses provide commentary during interviews and broadcasts. News reports follow an inverted pyramid structure, beginning with a headline and lead paragraph covering the key details of who, what, when, where, and why, followed by additional body details and less important information in the tail.