 But  reconstituting chains of triples has a  cognitive cost, and this makes it difficult for data producers to have meaningful overviews of the content of their own datasets.
<clarity>  But  reconstituting chains of triples has a  cognitive cost, and this makes it difficult for data producers to have meaningful overviews of the content of their own datasets.
 But data producers face a problem: reconstituting chains of triples has a cognitive cost, and this makes it difficult for data producers to have meaningful overviews of the content of their own datasets.