question: What is one of Europes cleanest
answer: The local bus fleet is one of Europe 's cleanest , using only buses compliant with the Euro-VI standard as well as electric buses for inner city transport
turker_answer: The local bus fleet is one of Europe 's cleanest , using only buses compliant with the Euro-VI standard as well as electric buses for inner city transport .
rule-based: One of Europes cleanest is the local bus fleet is one of Europe 's cleanest , using only buses compliant with the Euro-VI standard as well as electric buses for inner city transport