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George Pull­man is best known for what improve­ment to rail­road trans­port­a­tion?

A
Sleeping car
B
Standardized gauge
C
Rail brake system
D
Bullet train
DZ7p In 1994, musician and actor Ruben Blades ran for president of what Central American country?
Vx8j Which of these is not a wire in a household plug?
D5m4 Something which is extremely secure is said to be "as safe as..." what?
Vx2l On the television series "Get Smart," what part of Maxwell Smart's attire doubled as a phone?
VBRq Who is missing from this sequence: The Protester, Barack Obama, ____, Ebola fighters, Angela Markel, Donal Trump?
VB6y Which television series featured the wedding of real-life couple Jill Eikenberry and Michael Tucker?
D9Ml Lady Gaga took her stage name from a song by which band?
DP8E Thought was supposed to cure his fever, what toxic element with the symbol Sb may have fatally poisoned Mozart?
3Aoj Before becoming a solo artist, Grammy winner Lauryn Hill was part of what group?
D9q6 Which of these African nations is farther north?