useless trivia: What Word Means: A Dog?

Questions

In which European city are the headquarters of OPEC (Organisation of Petroleum Exporting Countries)?

Which sportswear company was founded in Germany by a certain Dr. Dassler?

Where in the solar system would an observer see the "Cassini's Division"?

Which major land offensive began on the 1st July, 1916?

Prior to 1998 who was the last non-American to win the U.S. Masters golf championship?