digraph obama {
  Barack [ URL="https://en.wikipedia.org/wiki/Barack_Obama" ]
  Michelle [ URL="https://en.wikipedia.org/wiki/Michelle_Obama Michelle"]
  Malia [ URL="https://en.wikipedia.org/wiki/Family_of_Barack_Obama#Malia_and_Sasha_Obama" ]
  Sasha [ URL="https://en.wikipedia.org/wiki/Family_of_Barack_Obama#Malia_and_Sasha_Obama" ]
  Michelle -> Barack [ label="husband"]
  Michelle -> Malia [ label="daughter"]
  Michelle -> Sasha [ label="daughter"]
}