Parse optional data fields in Wonders JSON
Parse optional data fields in Wonders JSON

alexcurylo/iso3166-flags-maps-worldheritage,alexcurylo/iso3166-flags-maps-worldheritage,alexcurylo/iso3166-flags-maps-worldheritage,alexcurylo/iso3166-flags-maps-worldheritage,alexcurylo/iso3166-flags-maps-worldheritage