Original: However so far the Constitutional court has only used this power twice, outlawing the SRP (Socialist Reichs Party, a successor to the NSDAP) in 1952, and the KPD (Communist Party of Germany) in 1956.
Simplified: However so far the Constitutional court has only used this power twice, outlawing the KPD (Communist Party of Germany) and the SRP (Socialist Reich Party, a successor to the NSDAP) because both parties ideas went against the constitution.