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\*.
--------
Question: when did 'open era' began in tennis

Answer: 1968


Question: who came in second in the 2018 kentucky derby

Answer: Good Magic


Question: where does the surname janse van rensburg come from

Answer:
South African