5025
the difficulties in developing vista stemmed from its monolithic structure and the need for 'backwards compatibility ' , i.e . ensuring that software used by customers on older versions of windows will work under vista .
 entity origin: difficulties, structure
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: difficulties, structure