Complex sentence: In 1931 this tree was established to be the largest living thing in the world, hence the largest tree in the world, it has a volume of 52,508 cubic feet (1,487 cubic meters).
Split into simpler sentences: In 1931 this tree was established to be the largest living thing in the world, therefore, also the largest tree in the world. It has a volume of 52,508 cubic feet (1,487 cubic meters).