442
the galileoscope is named after the italian astronomer , who first observed the heavens through a telescope 400 years ago .
 instrument agency: astronomer, telescope
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:
 instrument agency: astronomer, telescope