code: def award_group_funding_source(tag):
      
      award_group_funding_source = []
      funding_source_tags = extract_nodes(tag, "funding-source")
      for t in funding_source_tags:
          award_group_funding_source.append(t.text)
      return award_group_funding_source
docs: Given a funding group element
      Find the award group funding sources, one for each
      item found in the get_funding_group section