question: What is causing the salination of the Werra river ?
answer: discharges of K+S salt mines around Unterbreizbach
turker_answer: Discharges of K+S salt mines around Unterbreizbach is causing the salination of the Werra river .
rule-based: Discharges of K+S salt mines around Unterbreizbach is causing the salination of the Werra river .