public function __construct( array $people ) {
    $all = [];

    foreach ( $people as $key => $person ) {
      if ( ! isset( $person['role'] ) ) {
        $person['role'] = 'none';
      }
      if ( ! isset( $person['url'] ) && isset( $person['twitter'] ) ) {
        $person['url'] = 'https://twitter.com/' . $person['twitter'];
      }
      if ( ! isset( $person['avatar'] ) && isset( $person['gravatar'] ) ) {
        $person['avatar'] = 'https://0.gravatar.com/avatar/' . $person['gravatar'] . '?s=120';
      }
      $all[ $key ] = new Genesis_Contributor( $person['name'], $person['url'], $person['avatar'], $person['role'] );
    }

    $this->people = $all;
  }