old_contents: import six
  
  from .node import Node
  
  
  @six.python_2_unicode_compatible
  class Investment(Node):
      """Represents a Investment (investor-investment) on CrunchBase"""
  
      KNOWN_PROPERTIES = [
          'type',
          'uuid',
          'money_invested',
          'money_invested_currency_code',
          'money_invested_usd',
      ]
  
      KNOWN_RELATIONSHIPS = [
          'funding_round',
          'invested_in',
      ]
  
      def __str__(self):
          return u'{series} {invested_in}'.format(
              series=self.funding_round.series,
              invested_in=self.invested_in.name,
          )
  
      def __repr__(self):
          return self.__str__()
  
new_contents: import six
  
  from .node import Node
  
  
  @six.python_2_unicode_compatible
  class Investment(Node):
      """Represents a Investment (investor-investment) on CrunchBase"""
  
      KNOWN_PROPERTIES = [
          'type',
          'uuid',
          'money_invested',
          'money_invested_currency_code',
          'money_invested_usd',
      ]
  
      KNOWN_RELATIONSHIPS = [
          'funding_round',
          'invested_in',
          'investors',
      ]
  
      def __str__(self):
          if self.money_invested:
              return u'{invested}'.format(
                  self.money_invested
              )
  
          if hasattr(self, 'investors'):
              return u'{investors}'.format(self.investors)
  
          if self.type:
              return u'{type}'.format(self.type)
  
          return u'Investment'
  
      def __repr__(self):
          return self.__str__()
  
subject: Add new relationship to Investment resource