Suppose The Great Wall of China is a series of stone and earth fortifications that were built across the historical northern borders of China to protect and consolidate territories of Chinese states and empires. Several walls were being built as early as the 7th century BC; these, later joined together and made bigger and stronger, are now collectively referred to as the Great Wall.
Can we infer that "The Great Wall of China was built in the 20th century."? Yes, no, or maybe?