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\*.

when did trinidad and tobago become an independent nation
1962

who was crowned emperor of the west in 800 ce
Charlemagne

when did the 2nd generation ipad come out

March 25, 2011