Slight update of the kgtk import-wikidata command
-This command will import Wikidata into KGTK format and generates 3 files.
+This command will import a Wikidata dump in json format (compressed in gzip or bz2) into KGTK format, generating 3 files:
- A nodes file containing all Qnodes and Pnodes in Wikidata
- An edges file containing all the statements in Wikidata
