3496
She theorized that soft sands in the Middle East would have made a two-wheeled precursor of the chariot impractical , and pointed to the four-wheeled carriages discovered by Sir Leonard Woolley in the so-called King 's Tomb in Ur , a Sumerian city that flourished in Lower Mesopotamia -LRB- now Iraq -RRB- about 4,500 years ago .
 location contains: Middle East, Iraq
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:  Middle East, Iraq 
Answer:
 location contains: Middle East, Iraq