With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Walt Whitman was a type of nurse.
text_B: The Indianapolis Police Department -LRB- IPD -RRB- -LRB- September 1 , 1854 -- December 31 , 2006 -RRB- was the principal law enforcement agency of Indianapolis , Indiana , under the jurisdiction of the Mayor of Indianapolis and Director of Public Safety .. Mayor of Indianapolis. Mayor of Indianapolis. Prior to the consolidation with the Law Enforcement Division of the Marion County Sheriff 's Department to form the Indianapolis Metropolitan Police Department , 1,230 sworn police officers and 250 non-sworn personnel were employed by the department .. Indianapolis Metropolitan Police Department. Indianapolis Metropolitan Police Department
not_related.