Misc: What distance is the Olympic steeplechase contested over (in metres)?

Questions

Who claimed to be ‘Anastasia’, daughter of the murdered Tsar Nicholas II?

What was the name of the gang that were responsible for the St. Valentines Day Massacre?

What was the name of Fred Astaire’s dancing sister?

Who was Myrna Loy’s scree partner in ‘The Thin Man’ movie series?

Who was William Powell’s screen partner in ‘The Thin Man’ movie series?