| tutorial data
| Ronny Kohavi

brown, cheap,    yes, reject.
grey,  cheap,    yes, reject.
black, average,  yes, reject.
brown, average,  yes, reject.
grey,  average,  yes, reject.
brown, expensive,yes, accept.
grey,  expensive,yes, accept.
brown, cheap,    no,  reject.
blonde,cheap,    no,  reject.
grey,  cheap,    no,  reject.
black, average,  no,  reject.
brown, average,  no,  reject.
blonde,average,  no,  reject.
black, expensive,no,  reject.
grey,  expensive,no,  reject.