Seven bias patterns are defined concerning test leakage and sample selection bias, available in the folder sparql_queries/biasPatterns.
Test leakage patterns:
- Near-duplicate relations
- Near-inverse relations
- Near-symmetric relations
For sample selection bias, we reused patterns defined in the work of Rossi et al., and implemented them as SPARQL queries to be used over any RDF Graph:
- Overrepresented tail answers (referred to as Type 1 Bias by Rossi et al.)
- Overrepresented head answers
- Default tail answers (referred to as Type 2 Bias by Rossi et al.)
- Default head answers
Using these patterns, we queried the number of bias-affected triples for each split in every dataset with SPARQL. The queries can be found in the folder sparql_queries/affectedTriples.