Assertion: empire's rival | /r/HasProperty | the british empire
Facets:
Source sentences:
text: By the end of the 19th century the size of the empire was about 22,400,000 square kilometers (8,600,000 sq mi) or almost 1/6 of the Earth's landmass; its only rival in size at the time was the British Empire.
text: The Mongol Empire (1206–1368) was the largest contiguous land empire in world history (with its only rival in total extent being the British Empire).