Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Input: A police dog ( also called a K-9 ) is a dog trained to help police and other law enforcement people .
Output:
A police dog , known in some English-speaking countries as a " K-9 " or " K9 " ( a homophone of " canine " ) , is a dog that is specifically trained to assist police and other law-enforcement personnel .