text: -- Name: GetValuesForTag
  -- Schema: posda_phi
  -- Columns: ['tag', 'value']
  -- Args: ['tag', 'scan_id']
  -- Tags: ['tag_values']
  -- Description: Find Values for a given tag for all scanned series in a phi scan instance
  -- 
  
  select
    distinct element_signature as tag, value
  from
    scan_element natural join series_scan natural join
    seen_value natural join element_signature
  where element_signature = ? and scan_event_id = ?
  