13733
 Ashar Husain , the owner of Sport Aviation , a flight school in Erwinna , Pa. , in Bucks County , where the plane had taken off , said the surviving pilot was an experienced flier and regular customer who rented planes . 
 location contains: Bucks County, Erwinna
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Bucks County, Erwinna 
Answer:
 location contains: Bucks County, Erwinna