2045
Japanese officials said Tuesday that Princess Kiko , the wife of Emperor Akihito 's second son , Prince Akishino , is pregnant , raising hopes for a long-awaited male heir to one of the world 's oldest hereditary monarchies and throwing into doubt imperial law revisions that would allow a female line to hold the throne .
 children: Akihito, Prince Akishino
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: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 children: Akihito, Prince Akishino