Assertion: sperm whale | /r/AtLocation | its head
Facets:
Source sentences:
text: Part of what made the sperm whale so popular during the whaling era was the presence of their spermaceti oil which came from the spermaceti organ (hence the name sperm whale) that is located in its head.
text: They are named after the waxy substance, spermaceti, found in their heads.
text: Sperm whales are named after the spermaceti – a waxy substance that was used in oil lamps and candles – found on their heads.