instruction: Distinguish between manmade and natural structures from the following:
  Statue of Liberty
  Suez canal
  Niagara Falls
  Vatical City
  Valley of Death
  Himalayas
  Angorwat Temple
  Taj Mahal
  River Rhine
  The strait of Malacca
  Brooklyn bridge
response: Manmade:
  Brooklyn bridge
  Taj Mahal
  Vatical City
  Angorwat Temple
  Statue of Liberty
  Suez canal
  
  Natural structures:
  Niagara Falls
  Valley of Death
  The strait of Malacca
  River Rhine
  Himalayas