Sky, which formed from the combination of Britain's BSkyB, Sky Deutschland (Other OTC: SKDTF - news ) and Sky Italia to serve 20 million customers in Europe, said the group had seen its highest organic customer growth for 11 years in Britain and Ireland (Other OTC: IRLD - news ) , and its highest ever customer growth in Germany and Austria.
Analyze the relationship between 'Sky Deutschland' and 'Sky' within the context of the input sentence.
Options: operator, product/material produced, industry, parent organization