Assertion: kangaroo's number | /r/HasProperty | introduced by human
Facets:
Source sentences:
text: A number of bird species have been introduced by humans; some, like the European goldfinch and greenfinch, coexist happily with Australian species,[citation needed] while others, such as the common starling, common blackbird, house sparrow and Indian mynah, are destructive of some native bird species and thus destabilise the native ecosystem.[citation needed]