Refine SPARQL query to ignore CORD19 triples

[justaddcoffee]

@matentzn could you have a look at this SPARQL query?

Before today's rebuild, this returned 30 or so rows, but now is including 30k or so CORD19 triples like this:

<http://identifiers.org/uniprot/P0DTC2> | bl:related_to | <https://www.example.org/UNKNOWN/CORD_027f86c44365e0ba6a6c26e24134c4c3e98a72ef>

Can you help me tweak this SPARQL query to ignore these triples?

[justaddcoffee]

FWIW, they CORD19 items are all bl:Publications that are provided_by “SciBite-CORD-19” - see for example results of this SPARQL query:

DESCRIBE <https://www.example.org/UNKNOWN/CORD_09de57e5401565a1e80361d32b09ce66b3a988c8>

[justaddcoffee]

closed by #227