77847
The planet was discovered when periodic Doppler shifts in the star 's spectrum revealed the presence of a planet , similar to the spectroscopic binary nature of Psi ¹ Draconis AC .
 location: Psi ¹ Draconis AC
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Psi ¹ Draconis AC 
Answer:
 location: Psi ¹ Draconis AC