Sûre(redirected from be sure to)
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Sauer(zou`ər), principal river of Luxembourg, c.100 mi (160 km) long, rising in the Ardennes, SE Belgium. It flows east through Luxembourg, then south (forming part of the Luxembourg-German border) to join with the Moselle (Mosel) River. With its tributaries, the Our, the Clerf, and the Alzette (which passes through the city of Luxembourg), the Sûre drains all of Luxembourg.
["Towards a Broader Basis for Logic Programming", Bharat Jayaraman, TR CS Dept, SUNY Buffalo, 1990].