| Churn data (artificial based on claims similar to real world)

churn.

state:			AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL,
			GA, HI, IA, ID, IL, IN, KS, KY, LA, MA,
			MD, ME, MI, MN, MO, MS, MT, NC, ND, NE,
			NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI,
			SC, SD, TN, TX, UT, VA, VT, WA, WI, WV,
			WY.
account length:		continuous.
area code:		continuous.
phone number:		ignore.
international plan:	no, yes.
voice mail plan:	no, yes.
number vmail messages:	continuous.
total day minutes:	continuous.
total day calls:	continuous.
total day charge:	continuous.
total eve minutes:	continuous.
total eve calls:	continuous.
total eve charge:	continuous.
total night minutes:	continuous.
total night calls:	continuous.
total night charge:	continuous.
total intl minutes:	continuous.
total intl calls:	continuous.
total intl charge:	continuous.
number customer service calls:	continuous.

churn:			0, 1.
