instruction:
Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
question:
police action is a term for the use of military forces without declaring war.
answer:
police action


question:
mariner 10 was a robotic nasa space probe.
answer:
mariner 10


question:
the premier of south australia is the head of the south australian government.
answer:

premier of south australia