The composition ‘A Filter – Passing through’ situated in the centre of the town of Pernik is symptomatic to the direction of their further artistic quest. It was created between the erection of the two compositions, already mentioned. The three massive metal cubes 2 metres of height and 2,5 tons of weight) personify the life and spirit of the town, which wholly depend on the output of the metal-processing works there. They render the sense of burden, darkness and lack of hope, which seem to overwhelm this town, in a clear and categorical way. As if grown out of the earth, resembling enormous pieces of ore, the cubes, on the one hand show the everlasting and indescribable beauty of this natural treasure, and on the other hand, symbolise people’s quite sad sometimes, dependence on it.