decision_tree_example1.txt for Ch7 Programming Col. Intel.

slashdot    yes 18  Weeabo  None    USA
google  yes 23  Weeabo  Premium France
digg    yes 24  Otaku   Basic   USA
kiwitobes   yes 23  Swagger Basic   France
google  no  21  Weeabo  Premium UK
(direct)    no  12  Swagger None    New Zealand
(direct)    no  21  Otaku   Basic   UK
google  no  24  Otaku   Premium USA
slashdot    yes 19  Swagger None    France
digg    no  18  Weeabo  None    USA
google  no  18  Otaku   None    UK
kiwitobes   no  19  Otaku   None    UK
digg    yes 12  Swagger Basic   New Zealand
slashdot    no  21  Swagger None    UK
google  yes 18  Otaku   Basic   UK
kiwitobes   yes 19  Weeabo  Basic   France