Task: Question Answering
Input (English): Sentence: The City Parliament (de: Stadtrat, fr: Conseil de ville) holds legislative power. It is made up of 80 members, with elections held every four years. The City Parliament decrees regulations and by-laws that are executed by the City Council and the administration. The delegates are selected by means of a system of proportional representation. 
Question: How often are elections held for the City Parliament?
Output (English): every four years.