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:
the river trent is one of the major rivers of england.
answer:
river trent


question:
the melbourne storm are an australian professional rugby league team.
answer:
melbourne storm


question:
the somatic nervous system (sns) is part of the peripheral nervous system.
answer:

somatic nervous system