instruction:
In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
question:
The most important mineral product of northern chile is?
answer:
copper


question:
Who invented the first curling iron in 1872?
answer:
Francois Marcel Grateau


question:
Where are chromosomes found in multi cellular organisms?
answer:

cell nucleus