user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: ger class s56 belongs to which locomotive class? 
Knowledge Triplets: GWR Hercules Class, rail.steam_locomotive_class.wheel_configuration, 0-6-0
GER Class S56, rail.steam_locomotive_class.wheel_configuration, 0-6-0
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GWR 388 class
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GWR Hercules Class
GWR 1361 Class, rail.steam_locomotive_class.wheel_configuration, 0-6-0
GNR Class J13, rail.steam_locomotive_class.wheel_configuration, 0-6-0
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GER Class C53
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GWR 1361 Class
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GER Class Y14
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GNR Class J13
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, British Rail Class 04
British Rail Class D2/12, rail.steam_locomotive_class.wheel_configuration, 0-6-0
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, British Rail Class D2/12
GER Class S56, rail.locomotive_class.uic_classification, C n2t
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, Caledonian Railway 782 Class
GER Class C53, rail.steam_locomotive_class.wheel_configuration, 0-6-0
British Rail Class 04, rail.steam_locomotive_class.wheel_configuration, 0-6-0
GWR Pyracmon Class, rail.steam_locomotive_class.wheel_configuration, 0-6-0
GER Class Y14, rail.steam_locomotive_class.wheel_configuration, 0-6-0
Caledonian Railway 782 Class, rail.steam_locomotive_class.wheel_configuration, 0-6-0
GWR 388 class, rail.steam_locomotive_class.wheel_configuration, 0-6-0
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GER Class S56
0-6-0, rail.steam_locomotive_wheel_configuration.locomotive_classes, GWR Pyracmon Class

Answer: 0-6-0