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The number of atoms contained in this volume is referred to as the Avogadro number , and the determination of this number is tantamount to the knowledge of the mass of an atom since the latter is obtained by dividing the mass of a mole of the gas by the Avogadro constant .
 person: Avogadro; person: Avogadro
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Avogadro; person: Avogadro