3395
To strengthen his claim and unite the two feuding noble houses Elizabeth and Margaret agreed that  Henry  should marry Edward IV and Elizabeth's oldest daughter  Elizabeth of York  who upon the death of her brothers became the Yorkist heiress .
 spouse: Henry, Elizabeth of York
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: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 spouse: Henry, Elizabeth of York