Bug 1 — _parse_relation_result (methods.py):
Relations whose subject/object weren't in the pre-extracted NER list were
silently dropped because match_entity() returned None and the old code
gated on `if subject_entity and object_entity`. Now unmatched names
produce a synthetic UNKNOWN Entity so every LLM-returned relation is
preserved (all three Apple co-founders are now returned).
Bug 2 — _match_pattern (reasoner.py):
Rewrote the regex builder to split on ?var placeholders first, then
apply re.escape() only to the surrounding literal segments. The old
approach (escape-then-sub) left edge cases where pre-bound variables
and multi-word values with spaces could fail to unify. The new
implementation also handles repeated variables via backreferences and
uses non-greedy .+? to avoid over-consuming literal separators.
Closes#354
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
