benchmarks for some queries
extract get_data_n method
refactor get_data_xy to use get_data_n
debug logging during benchmarks
Merge branch 'unify-multidimensional-queries'
build a cache of uris and notations
include gouped dimensions in notations query
construct queries with URIs instead of notations
shared instance of `notations` lookup container
simplify n3 literal/uri quoting
warm the cache before running any other benchmark
Merge branch 'query-using-uri'