Suppose The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials. The main wall has a total length of 13,171 miles (21,196 kilometers) and dates back to the 7th century BC, with various sections built and rebuilt over the centuries.
Can we infer that "The Great Wall of China was built in the 18th century."? Yes, no, or maybe?