41387
Often derived from grape varieties such as Pedro Ximénez , it is made by boiling unfermented grape juice until the volume is reduced by at least 50 % , and its viscosity reduced to a syrup .
 Pedro Ximénez, grape juice, syrup
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Text: {0} 
Answer:
 Pedro Ximénez, grape juice, syrup