code: def get_needs_provenance(parameters):
      
      if 'minimum needs' not in parameters:
          return None
      needs = parameters['minimum needs']
      provenance = [p for p in needs if p.name == tr('Provenance')]
      if provenance:
          return provenance[0]
      return None
docs: Get the provenance of minimum needs.
  
      :param parameters: A dictionary of impact function parameters.
      :type parameters: dict
  
      :returns: A parameter of provenance
      :rtype: TextParameter