Assertion: narwhal | /r/HasProperty | difficult to study
Facets:
value: very
type: DEGREE
Source sentences:
text: Narwhals are very difficult to study as they are large fast swimming animals that live in very cold seas in very remote parts of the world.
text: Though scientific research on the whale has advanced, and there is a wealth of traditional Inuit knowledge about the species, the narwhal is still difficult to study, because the animals live in a challenging environment, said Nigel Hussey, a researcher at the University of Windsor in Canada.
text: Narwhals are so difficult to study that researchers can’t even reliably document their current population trend.