I want to know the answer to the following question:
How many shipping containers did the Port of Melbourne handle during a 12-month period in 2007, making it one of the top five ports in the Southern Hemisphere?
All the background I'm provided with is that "The port handled two million shipping containers in a 12-month period during 2007, making it one of the top five ports in the Southern Hemisphere.". Is that enough to answer the question?