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

Answer: river trent


Question: in greek mythology, the nereids ( "nereides") are sea nymphs, the fifty daughters of nereus, the old man of the sea, and the okeanid doris.

Answer: nereid


Question: tabouleh ( "tabūlah"; also tabbouleh or tab(b)ouli) is a salad.

Answer:
tabouleh