Assertion: chowder | /r/CapableOf | thicken with heavy roux
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Source sentences:
text: Impossible to pin on one person, but chowder, any of a variety of soups featuring salted pork fat, thickened with a flour, heavy roux, crumbled ship biscuit or saltine crackers and milk, first materialized with Breton fisherman who migrated south to New England from Newfoundland.