See the first example query in the README.md:
# Cultuurhistorische Thesaurus: query SPARQL endpoint
bin/run sources:query --identifiers cht --query fiets
This query returns an empty result set, …
If a source returns just one term, this term is ignored by the `TermsTransformer`, yielding an empty result set. For example:
`./bin/run sources:query --identifiers cht --query rembrandt --loglevel…