instruction:
You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
question:
Category: ROYALTY 
Clue: Mswati III became the king of this country in 1986 when he was 18
answer:
swaziland


question:
Category: FOOD 
Clue: A popular health food, this soybean curd is used to make a variety of dishes & an ice cream substitute
answer:
tofu


question:
Category: PIONEER TRAILS 
Clue: Thiis trail's western terminus was the valley of the Willamette River
answer:

oregon trail