Assertion: potato's calorie | /r/HasProperty | 95 gigajoules per hectare
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Source sentences:
text: The food energy yield of potatoes – about 9.2 million calories per acre (95 gigajoules per hectare) – is higher than that of maize (7.5 million), rice (7.4 million), wheat (3 million), or soybean (2.8 million).