Assertion: elephant's role | /r/HasProperty | vital
Facets:
Source sentences:
text: Having adapted to life across Africa’s diverse ecosystems, the African elephant plays a vital role in maintaining ecological harmony.
text: For a brief time, war elephants played a vital role in Southern Han victories such as the invasion of Chu in 948 AD, but the Southern Han elephant corps were ultimately soundly defeated at Shao in 971 AD, decimated by crossbow fire from troops of the Song Dynasty.