Assertion: sperm whale's spermaceti | /r/HasProperty | oil
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Source sentences:
text: In spite of the danger, sperm whales were hunted the world over for the array of valuable products these whales contained - whale oil for lamps and lubricants; spermaceti (oil from the forehead) for high quality, smokeless candles; and ambergris, a waxy by-product of digestion which was used in the manufacture of fragrances.