68970
The first direct measurement of the distance to a star ( 61 Cygni at 11.4 light-years ) was made in 1838 by Friedrich Bessel using the parallax technique .
 astronomical object: 61 Cygni; person: Friedrich Bessel
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: 61 Cygni, Friedrich Bessel 
Answer:
 astronomical object: 61 Cygni; person: Friedrich Bessel