49035
Ms. Sultan began teaching at Vassar College and at the 92nd Street Y in New York before taking a post at the Masters ' School in Dobbs Ferry , N.Y. , in 1952 , which she held until 1971 .
 location contains: New York, Dobbs Ferry
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  New York, Dobbs Ferry 
Answer:
 location contains: New York, Dobbs Ferry