question: How was the EU 's leadership demonstrated ?
answer: the role of the EU in securing the ratification and coming into force of the Kyoto Protocol despite opposition from the United States
turker_answer: The EU 's leadership was demonstrated through its role in securing the ratification and coming into force of the Kyoto Protocol despite opposition from the United States .
rule-based: The EU 's leadership was demonstrated by the role of the EU in securing the ratification and coming into force of the Kyoto Protocol despite opposition from the United States .