The fifteen elements with atomic numbers 57 to 71, which includes Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pm), Europium (Eu), Erbium (Er), Thulium (Tm), Ytterbium (Yb) and Lutetium (Lu), are known as what?
What is the name of the airport at Salzburg?
From the 17th century to the early 20th century what was the main material used for billiard balls?
What is a legislative or executive act by which a state restores those who may have been guilty of an offence against it to the positions of innocent people?
When did Netflix stream its first original series, "Lilyhammer", in North America?
What nationality was Abel Janszoon Tasman the voyager, explorer and map maker?
Who was the (subsequently) Pulitzer-Prize-winning American playwright who wrote "The Odd Couple"?