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Which of the following requires reification for representing in a knowledge graph?
| a. |
John believes that life is good. |
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| b. |
John was referred to Peter by Mary. |
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| c. |
The effectiveness of a vaccine is 95%. |
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| d. |
Earth revolves around the Sun. |
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| e. |
On LinkedIN John rated Peter for being an expert in AI. |
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