Assertion: armyworm's spread | /r/HasProperty | harder to explain
Facets:
Source sentences:
text: The rapid spread to the Indian Ocean Islands and to Asia is harder to explain by natural flight, so it is possible that the frequent flights to those countries could have played a part.
text: The rapid spread to the Indian Ocean Islands is harder to explain by natural flight, so it is possible that the frequent flights from the mainland to those countries could have played a part.