Question: Otto Addo is currently the assistant manager of a German football club founded in what year?
Sentence (from "Borussia Mönchengladbach"): Borussia VfL 1900 Mönchengladbach e.V., commonly known as Borussia Mönchengladbach (] ), Mönchengladbach or Gladbach, is a German football club in Mönchengladbach, North Rhine-Westphalia.
Relevant evidence: No