when was harry potter first published in the us???

Answer: 1 September 1998

Question: when did the first smart phone come out?

Answer: 1999

Answer this question: ant man and the wasp dc or marvel??

Marvel

Q: when did the book of eli come out?A: 2010

Input: what is the name of the snowman in the disney movie frozen?

Output: Olaf

Please answer this: when did mizoram became a state of india?
20 February 1987