Suppose The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials. The wall stretches over 13,000 miles and was built to protect China from invasions by various nomadic groups. Construction of the Great Wall began in the 7th century BC and continued into the Ming Dynasty.
Can we infer that "The Great Wall of China was built in the 20th century"? Yes, no, or maybe?