Issue description

Blazegraph complains on malformed DELETE query in its logs. I think it's related to a rollback mechanism when node fails to insert KC completely into the triple store and rolls back any changes it performed as a part of this insert process.
This is an example for token_id 3616718, but there are more of them.
Log - malformed_query.txt

Specifications

• Node version: 8.0.11+hotfix.1
• Platform: Ubuntu