53
Among his pupils were Josef Tichatschek , creator of Wagner 's Rienzi and Tannhäuser , the Austrian tenor Heinrich Kreutzer and Sophie Löwe , one of the most famous opera singers of her time .
 person: Josef Tichatschek; person: Heinrich Kreutzer; person: Sophie Löwe
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: Josef Tichatschek; person: Heinrich Kreutzer; person: Sophie Löwe