 Complete the following phrase:  Chantrea also sometimes known with the Basque spelling Txantrea is the representative team for the , a working-class area with a strong sense of community identity, built in the 1950s to provide housing for migrants from rural areas of Navarre. The club has a long-term collaboration agreement with Athletic Club renewed in 2017 for another four years which has seen several promising players move to the Bilbao team. Recent graduates include Borja Ekiza, Iñigo Pérez, Mikel San José, Gorka Iraizoz and Iker Muniain, all of whom played a role in their run to the 