Question: In Prolog, we can define a relationship parent(X,Y) describing that X is a parent of Y. For example: parent(Tom, Sarah). parent(Anika, Sarah). parent(Yue, Tom).

In Prolog, we can define a relationship parent(X,Y) describing that X is a parent of Y. For example: parent(Tom, Sarah). parent(Anika, Sarah). parent(Yue, Tom). parent(Jaroslav, Tom). parent(Jaroslav, Tim). parent(Yue, Tim). parent(Tom, Viktor). parent(Anika, Viktor). implement a rule siblings(X,Y) that holds if X and Y are siblings - meaning they have the same parents. For example, (Tim, Tom) and (Sarah, Viktor) are siblings.
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