question: What does traffic elevate
answer: increasing traffic and the ancient city plan , traffic congestion is a common phenomenon in and around Utrecht , causing elevated levels of air pollutants
turker_answer: Traffic elevates increasing traffic and the ancient city plan , traffic congestion is a common phenomenon in and around Utrecht , causing elevated levels of air pollutants
rule-based: Traffic elevates increasing traffic and the ancient city plan , traffic congestion is a common phenomenon in and around Utrecht , causing elevated levels of air pollutants