RDF.Description.take

You're seeing just the function take, go back to RDF.Description module for more information.
Link to this function

take(description, predicates)

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Specs

take(t(), [RDF.Star.Statement.coercible_predicate()] | Enum.t() | nil) :: t()

Creates a description from another one by limiting its statements to those using one of the given predicates.

If predicates contains properties that are not used in the description, they're simply ignored.

If nil is passed, the description is left untouched.