NRDC states its mission as follows: The Natural Resources Defense Council's purpose is to safeguard the Earth: its people, its plants, animals, and the natural systems on which all life depends.
NRDC is a mnemonic device that stands for Natural Resources Defense Council.
NRDC is an acronym which qualifies as a mnemonic device. I think the system takes issue with that term.
( z1 device :mod ( z2 mnemonic ) :ARG0-of ( z3 stand :ARG1 ( z4 organization :name ( z5 name :op "Natural" :op "Resources" :op "Defense" :op "Council" ) ) ) :domain z4 )