infospace: process book-5-chapter-03

Extract entities, map to VSM, and synthesize analysis.

examples/infospace-with-history/output/entities/sinking-fund.md

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+<!-- generated: provider=openrouter model=arcee-ai/trinity-large-preview:free date=2026-02-19 source=book-5-chapter-03 -->
+
+# Sinking Fund
+
+## Definition
+
+A dedicated fund established to gradually pay off public debt, typically created
+from surplus revenues or savings from reduced interest rates, intended to
+accumulate over time for debt reduction.
+
+## Source Chapter
+
+Book V, Chapter 3
+
+## Context
+
+Smith discusses sinking funds as a mechanism for debt reduction that was
+sometimes created from savings when interest rates were reduced, though he
+notes these funds were often diverted to other purposes.
+
+## Economic Domain
+
+Regulation
+
+---