TASK DEFINITION: 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\*.
PROBLEM: who played in the men's semi final in wimbledon in 2015

SOLUTION: Novak Djokovic

PROBLEM: when was the last time real madrid won la liga title

SOLUTION: 2017

PROBLEM: when did the packers play at camp randall

SOLUTION:
1999