A work of the United States government, as defined by United States copyright law, is "a <e1>work</e1> prepared by an officer or <e2>employee</e2> of the U.S. government as part of that person's official duties."
A work of the
A work of the United States government, as defined by United States copyright law, is "a work prepared by an officer or employee of the U.S. government as part of that person's official duties."
<triplet> work <subject> employee <object> Product-Producer(e1,e2)