'SHACL rule to compare the count of something with a value of another property

Suppose I have data like:

ex:Bob a ex:Person ;
    ex:follower ex:Jon ;
    ex:follower ex:Alice;
    ex:maxNumFollower 1.

I want to write a SHACL constraint that expresses that the number of the followers is less than or equal to the value of maxNumFollower. For instance here, we have two followers but the max is 1. So I want to raise a violation. Is this possible?

rdf rdfs shacl

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'SHACL rule to compare the count of something with a value of another property

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