Suppose The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, built along the northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups. This UNESCO World Heritage Site stretches approximately 13,171 miles and is a popular tourist attraction.
Can we infer that "The Great Wall of China was built to protect against invaders"? Yes, no, or maybe?