[SOLVED] CS CPS 721 Quiz 1

CPS 721 Quiz 1
2021 Practice Version
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Evaluating a Query Using Backchaining

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Read the knowledge base below carefully. It will be used for the following questions. Be careful not to assume anything that is not explicitly given.
Knowledge Base:
1. ann lives in toronto
2. bob lives in chicago
3. carol lives in edmonton
4. toronto is a city of ontario
5. chicago is a city of illinois
6. edmonton is a city of alberta
7. ontario is a region of canada
8. quebec is a region of canada
9. alberta is a region of canada
10. illinois is a region of america
11. if X is a city of Y and Y is a region of Z then Z is a country of X 12. if X lives in Y and Z is a country of Y then X is a resident of Z
Questions are marked automatically; be sure to follow the specified format when responding to short- answer questions.
Record the order in which the numbered statements from the knowledge base are applied when using the backchaining algorithm to the query ann is a resident of canada. Use a comma to separate the numbers. Do not use spaces. Example: 1,2,3
Your answer

How would the backchaining algorithm answer the following query: X is a country of montreal
X = america
X = canada
X = quebec
The query would fail
How would the backchaining algorithm answer the following query: america is a country of X
X = orlando
X = chicago
X = boston
The query would fail
How would the backchaining algorithm answer the following query: carol is a resident of X
X = canada
X = alberta
X = edmonton
X = america
The query would fail
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