Simplify the following text for a Grade 6 native English-speaking person.
Original: Winter apples , picked in late autumn and stored just above freezing , have been an important food in Asia and Europe for millennia , as well as in Argentina and in the United States since the arrival of Europeans .
Simplified: Asia and Europe have used winter apples as an important food for thousands of years . From when Europeans arrived , Argentina and the United States have used apples as food as well .