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 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:
 location contains: Earth, Europe; location contains: Earth, South America; location contains: Earth, Africa