90838
One of the 48 constellations described by the 2nd - century astronomer Ptolemy , Boötes is now one of the 88 modern constellations .
 Ptolemy, Boötes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ptolemy, Boötes