1 TOSCOW NH 2 3 4 5 6 7 8 9 LO 11 12 L3 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 32 83 34 85 36 37 38 39 Below we have some logical facts and some potential queries that could be run with those facts. Your goal is to fill in what these queries do. Ignore any warnings for this file. As a hint, you can run this file directly by: 8 swipl -s 5_exercises.pl ...and then issuing the queries at the prompt. Consider the following Prolog logicbase: 8 a (al, 1). a (A, 2). a (a3, N). b (1,bl). b (2,B). b (N, b3). C (X,Y) :- a (X,N), b (N, Y). d (X,Y) :- a (X,N), b (Y, N). d (X,Y) :- a (N, X), b (N, Y). Write out whether or not the following queries are true or false, replacing ??? where appropriate. If a query is true and involves variable instantiations, then write out all possible variable instantiations which make the query 8 true. Some have already been done for you, to give an example of the expected format. If you wish, you may simply copy and paste the output of SWI-PL here directly; we will be grading this by hand, so the output format isn't important.

1 TOSCOW NH 2 3 4 5 6 7 8 9 LO 11 12 L3 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 32 83 34 85 36 37 38 39 Below we have some logical facts and some potential queries that could be run with those facts. Your goal is to fill in what these queries do. Ignore any warnings for this file. As a hint, you can run this file directly by: 8 swipl -s 5_exercises.pl ...and then issuing the queries at the prompt. Consider the following Prolog logicbase: 8 a (al, 1). a (A, 2). a (a3, N). b (1,bl). b (2,B). b (N, b3). C (X,Y) :- a (X,N), b (N, Y). d (X,Y) :- a (X,N), b (Y, N). d (X,Y) :- a (N, X), b (N, Y). Write out whether or not the following queries are true or false, replacing ??? where appropriate. If a query is true and involves variable instantiations, then write out all possible variable instantiations which make the query 8 true. Some have already been done for you, to give an example of the expected format. If you wish, you may simply copy and paste the output of SWI-PL here directly; we will be grading this by hand, so the output format isn't important.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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