4745
the puzzle gradually emerged from a long-term study of the properties of asteroids carried out by mit professor of planetary science richard binzel and his students , along with postdoctoral researcher p. vernazza , who is now with the european space agency , and a.t. tokunaga , director of the university of hawaii 's institute of astronomy .
 entity origin: puzzle, study
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
Answer:
 entity origin: puzzle, study