Complex sentence: AmericasMart Atlanta is located in Atlanta, Georgia and is the world's largest (seven million square feet) permanent trade center for wholesale trade and the only permanent international trade center in the United States.
Split into simpler sentences: AmericasMart Atlanta is located in Atlanta, Georgia, and is known to be the largest permanent trade center for wholesale selling and buying in the world, as it is over seven million square feet in size. The mart is the only permanent international trade center in the United States.