f | 1 | [Path 1]: | f | 1 | [Path 1]:
| 2 | 0: Start of execution: Beginning Search |  | 2 | 0: Start of execution: Beginning Search
| 3 | 1: Searching: query |  | 3 | 1: Searching: query
| 4 | 2: Searching: in_law(patricia, arnold) |  | 4 | 2: Searching: in_law(patricia, arnold)
| 5 | 3: Searching: spouse(patricia, Candidate Variable_0) |  | 5 | 3: Searching: spouse(patricia, Candidate Variable_0)
| 6 | 4: Fail: spouse(patricia, Candidate Variable_0) | {'Result': 'Search Failed'} |  | 6 | 4: Fail: spouse(patricia, Candidate Variable_0) | {'Result': 'Search Failed'}
t | 7 | 5: Backtrack: in_law(patricia, arnold) | t |  |
| 8 | 6: Searching: sibling(arnold, patricia) |  |  |
| 9 | 7: Fail: sibling(arnold, patricia) | {'Result': 'Search Failed'} |  |  |
| 10 | 8: Fail: in_law(patricia, arnold) | {'Result': 'Search Failed'} |  | 7 | 5: Fail: in_law(patricia, arnold) | {'Result': 'Search Failed'}
| 11 | 9: Backtrack: query |  |  |
| 12 | 10: Searching: sibling_in_law(patricia, arnold) |  |  |
| 13 | 11: Searching: spouse(patricia, Candidate Variable_1) |  |  |
| 14 | 12: Found: spouse(patricia, connie) |  |  |
| 15 | 13: Searching: sibling(connie, arnold) |  |  |
| 16 | 14: Fail: sibling(connie, arnold) | {'Result': 'Search Failed'} |  |  |
| 17 | 15: Fail: sibling_in_law(patricia, arnold) | {'Result': 'Search Failed'} |  |  |
| 18 | 16: Fail: query | {'Result': 'Search Failed'} |  | 8 | 6: Fail: query | {'Result': 'Search Failed'}
|  |  |  | 9 |

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