If you get a disappointingly empty result, consult also the file /home/s3/paul/logic/match. Then give the goal about(Day,Month,7) to find out what happened within a week of your chosen date.
Subsequently, perhaps next week, you should give some thought (no cheating!) to how these predicates might be working.
Remember that ultimately (for Practical 2) you will need either to have written your code in terms of parent/3 or else to provide a conversion predicate which relates parent/2 (as considered in the recommended text) to parent/3.
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