0.5.3: sphinx warnings `reference target not found` about rdflib-sqlalchemy HOT 3 CLOSED

+ /usr/bin/sphinx-build -n -T -b man docs build/sphinx/man
Running Sphinx v4.5.0
Creating file api/rdflib_sqlalchemy.rst.
Creating file api/rdflib_sqlalchemy.base.rst.
Creating file api/rdflib_sqlalchemy.constants.rst.
Creating file api/rdflib_sqlalchemy.sql.rst.
Creating file api/rdflib_sqlalchemy.statistics.rst.
Creating file api/rdflib_sqlalchemy.store.rst.
Creating file api/rdflib_sqlalchemy.tables.rst.
Creating file api/rdflib_sqlalchemy.termutils.rst.
Creating file api/rdflib_sqlalchemy.types.rst.
Creating file api/modules.rst.
making output directory... done
loading intersphinx inventory from https://docs.python.org/3/objects.inv...
loading intersphinx inventory from https://rdflib.readthedocs.io/en/stable/objects.inv...
loading intersphinx inventory from https://docs.sqlalchemy.org/en/14/objects.inv...
building [mo]: targets for 0 po files that are out of date
building [man]: all manpages
updating environment: [new config] 11 added, 0 changed, 0 removed
reading sources... [100%] index
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
writing... python-rdflib-sqlalchemy.3 { api/modules api/rdflib_sqlalchemy api/rdflib_sqlalchemy.base api/rdflib_sqlalchemy.constants api/rdflib_sqlalchemy.sql api/rdflib_sqlalchemy.statistics api/rdflib_sqlalchemy.store api/rdflib_sqlalchemy.tables api/rdflib_sqlalchemy.termutils api/rdflib_sqlalchemy.types } /home/tkloczko/rpmbuild/BUILD/rdflib-sqlalchemy-0.5.3/rdflib_sqlalchemy/sql.py:docstring of rdflib_sqlalchemy.sql.union_select:: WARNING: py:class reference target not found: iterable of tuples
/home/tkloczko/rpmbuild/BUILD/rdflib-sqlalchemy-0.5.3/rdflib_sqlalchemy/types.py:docstring of rdflib_sqlalchemy.types.TermType:3: WARNING: py:class reference target not found: TypeDecorator
done
build succeeded, 2 warnings.