556
some posters ( e.g . number 18 ) encouraged the population of areas near the front to evacuate , thus avoiding the overcrowding and ensuing problems of food distribution and disease caused by the incoming refugees .
 cause effect: disease, refugees
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:
 cause effect: disease, refugees