who was india's longest serving prime minister???

Answer: Jawaharlal Nehru

Question: when was the last time the mavericks made the playoffs?

Answer: 201516

Answer this question: which world war 1 military tactic resulted in a prolonged stalemate??

trench warfare

Q: who wrote the song sweet dreams are made of this?A: David A. Stewart

Input: when were the motte and bailey castles built?

Output: 10th century onwards

Please answer this: which country produces most of the worlds diamonds?
Russia