0 rows where internal_semigroups = "Feyn"

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CREATE TABLE "categories_of_semigroups" (
	"internal_semigroups"	TEXT NOT NULL UNIQUE,
	"parent"	TEXT NOT NULL UNIQUE,
	FOREIGN KEY("parent") REFERENCES "categories"("name"),
	FOREIGN KEY("internal_semigroups") REFERENCES "categories"("name"),
	PRIMARY KEY("parent","internal_semigroups")
);