In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

[Q]: what is the primary type of mining that takes place under the bolivian mountain
[A]: silver


[Q]: what is the percentage of finding a four leaf clover
[A]: 5,000 to 1


[Q]: who is the giffgaff mobile network run by
[A]:
O2's owners Telefónica