code: def years_in_prison(data):
      data["with_years_in_prison"] = data["exonerations"].compute(
          [("years_in_prison", agate.Change("convicted", "exonerated"))]
      )
  
file_path: agate/exonerations.py
imports: import proof
  import agate
label_desc: Use image node_id 4 for calling a global function with example usage: years_in_prison(data) without return types