Assertion: pie | /r/CapableOf | continue to be important supply of food
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text: As pioneers spread westward, pies continued to be an important supply of food; while apple pies made from dried apples were popular, cooks often had to use fillers or substitutes to stretch out their barrels of apples, such as crushed crackers, vinegar-soaked potatoes, sour green tomatoes and soft-shelled river turtle meat.