/usr/include/KDE/Nepomuk/ is in kdelibs5-dev 4:4.14.16-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KDE/Nepomuk/File
/usr/include/KDE/Nepomuk/KRatingPainter
/usr/include/KDE/Nepomuk/KRatingWidget
/usr/include/KDE/Nepomuk/MassUpdateJob
/usr/include/KDE/Nepomuk/Query/
/usr/include/KDE/Nepomuk/Query/AndTerm
/usr/include/KDE/Nepomuk/Query/ComparisonTerm
/usr/include/KDE/Nepomuk/Query/FileQuery
/usr/include/KDE/Nepomuk/Query/GroupTerm
/usr/include/KDE/Nepomuk/Query/LiteralTerm
/usr/include/KDE/Nepomuk/Query/NegationTerm
/usr/include/KDE/Nepomuk/Query/OptionalTerm
/usr/include/KDE/Nepomuk/Query/OrTerm
/usr/include/KDE/Nepomuk/Query/Query
/usr/include/KDE/Nepomuk/Query/QueryParser
/usr/include/KDE/Nepomuk/Query/QueryServiceClient
/usr/include/KDE/Nepomuk/Query/ResourceTerm
/usr/include/KDE/Nepomuk/Query/ResourceTypeTerm
/usr/include/KDE/Nepomuk/Query/Result
/usr/include/KDE/Nepomuk/Query/SimpleTerm
/usr/include/KDE/Nepomuk/Query/StandardQuery
/usr/include/KDE/Nepomuk/Query/Term
/usr/include/KDE/Nepomuk/Resource
/usr/include/KDE/Nepomuk/ResourceManager
/usr/include/KDE/Nepomuk/Service
/usr/include/KDE/Nepomuk/Tag
/usr/include/KDE/Nepomuk/TagWidget
/usr/include/KDE/Nepomuk/Thing
/usr/include/KDE/Nepomuk/Types/
/usr/include/KDE/Nepomuk/Types/Class
/usr/include/KDE/Nepomuk/Types/Literal
/usr/include/KDE/Nepomuk/Types/Ontology
/usr/include/KDE/Nepomuk/Types/Property
/usr/include/KDE/Nepomuk/Utils/
/usr/include/KDE/Nepomuk/Utils/DynamicResourceFacet
/usr/include/KDE/Nepomuk/Utils/Facet
/usr/include/KDE/Nepomuk/Utils/FacetWidget
/usr/include/KDE/Nepomuk/Utils/ProxyFacet
/usr/include/KDE/Nepomuk/Utils/ResourceModel
/usr/include/KDE/Nepomuk/Utils/SearchWidget
/usr/include/KDE/Nepomuk/Utils/SimpleFacet
/usr/include/KDE/Nepomuk/Utils/SimpleResourceModel
/usr/include/KDE/Nepomuk/Variant
/usr/include/KDE/Nepomuk/Vocabulary/
/usr/include/KDE/Nepomuk/Vocabulary/NCAL
/usr/include/KDE/Nepomuk/Vocabulary/NCO
/usr/include/KDE/Nepomuk/Vocabulary/NDO
/usr/include/KDE/Nepomuk/Vocabulary/NEXIF
/usr/include/KDE/Nepomuk/Vocabulary/NFO
/usr/include/KDE/Nepomuk/Vocabulary/NIE
/usr/include/KDE/Nepomuk/Vocabulary/NMM
/usr/include/KDE/Nepomuk/Vocabulary/NMO
/usr/include/KDE/Nepomuk/Vocabulary/NUAO
/usr/include/KDE/Nepomuk/Vocabulary/PIMO
/usr/include/KDE/Nepomuk/Vocabulary/TMO