| http://www.w3.org/ns/prov#value | - I was intent on the lesson itself.???So, some fruit grows on trees, right????William, age 4, glanced at his big sister Penny to make sure he should be nodding.???How would we know if that tree was a lemon tree???? I asked, pointing to an evergreen in our backyard.They looked puzzled.???We would know it was a lemon tree if there were lemons on it,??? I said. ???How would we know if it was an orange
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