question: In contrast to large LD disks , what is the size of a standard CD ?
answer: 12 cm ( 4.7 in )
turker_answer: In contrast to large LD disks , the size of a standard CD is 12 cm ( 4.7 in ) .
rule-based: In contrast to large LD disks , the size of a standard CD is 12 cm ( 4.7 in .