useless trivia: What Word Means: Annoys - Irritates?

Questions

Which pop group's only U.K. chart entry, "Sugar Sugar" got to No. 1 in 1969?

Name either of the only sisters to both win acting Oscars?

How many lines does a sonnet have?

Brothers Jacob and Wilhelm were librarians and professors of language in 19th Century Germany. What was their surname?

Who had a number one hit in 1966 with Keep on Running?