Add spaces: Therehereceiveslettersofchildren.

Answer: There he receives letters of children.

Add spaces: UrbanluxuryapartmentforrentinBarcelona|Barcelona-Home

Answer: Urban luxury apartment for rent in Barcelona | Barcelona-Home

Add spaces: InstitutionCounciloftheEuropeanUnionRepresentativesofthegovernmentsoftheMemberStateswhoregularlytakepartinCouncilmeetingsPolandSTACHANCZYKPiotr

Answer:
Institution Council of the European Union Representatives of the governments of the Member States who regularly take part in Council meetings Poland STACHANCZYK Piotr