question: Who defined a common External Power Supply for use with smartphones sold ?
answer: The European Standardisation Bodies CEN , CENELEC and ETSI
turker_answer: The European Standardisation Bodies CEN , CENELEC , and ETSI defined a common External Power Supply for use with smartphones sold .
rule-based: The European Standardisation Bodies CEN , CENELEC and ETSI defined a common External Power Supply for use with smartphones sold .