A data storage and retrieval system includes a head carriage unit having a working surface and multiple heads disposed at the working surface. The batt layer comprises a wet paper web side layer and a machine side layer formed on an outer surface and inner surface of a base respectively, The base is manufactured from belt-shaped partial base bodies, which are connected to one another in side-by-side relationship. Similarity scores between content providers based on the matrix are calculated and interpretation clusters are assigned using the similarity scores.