Task: Explanation
Input (English): Jamie Murray and Bruno Soares were the defending champions, but lost in the first round to Sam Querrey and Donald Young. Question: Marc Polmans, with Andrew Whittington, reached the semi-final of a tennis tournament where who were the defending champions? Answer: Jamie Murray and Bruno Soares
Output (English): Jamie Murray and Bruno Soares were the defending champions, but lost in the first round to Sam Querrey and Donald Young.