811
But the sensors are not evenly distributed , with the greatest number in Europe , few in Africa and South America , and none covering the 70 percent of Earth 's surface that is water .
 location contains: Earth, Europe; location contains: Earth, South America; location contains: Earth, Africa
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:  Earth, Europe; Earth, South America; Earth, Africa 
Answer:
 location contains: Earth, Europe; location contains: Earth, South America; location contains: Earth, Africa