With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: A summertime treat, Italian ice, began its life as a sweeter adaptation of the Sicilian granita that was strictly lemon-flavored and brought to New York and Philadelphia. Its Hispanic counterpart, "piragua", is a common shaved-ice treat brought to New York by Puerto Ricans in the 1930s. Unlike the original dish which included flavors like tamarind, mango, coconut, customer demand for "piragua" is evolving to include the desire for flavors like grape and cherry, but these are fruits which are impossible to grow in the tropical Puerto Rican climate, and so they have to be produced artificially on the island and exported back to New York. 
text_B: Could a native farmer in Puerto Rico feasibly grow all of the fruits necessary to satisfy the most common customer demands for flavors of piragua, or Italian Ice?
NO.