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: barred spiral galaxy is the shape of which galaxy code? 
Knowledge Triplets: g.125_l37ly, base.schemastaging.pronunciation.yomigana, ぼううずまきぎんが
Barred spiral galaxy, astronomy.galaxy_classification_code.galaxy_shape, SBc
Barred spiral galaxy, user.avh.default_domain.ellerdale_topic.ellerdale_id, 0082-b0b9
Milky Way, astronomy.galaxy.galaxy_classification_hubble, SBc
Barred spiral galaxy, astronomy.galactic_shape.galaxies_of_this_shape, SBc
Barred spiral galaxy, astronomy.galactic_shape.galaxies_of_this_shape, SB(s)m pec
SBc, astronomy.galaxy_classification_code.galaxies_of_this_code, Milky Way
Barred spiral galaxy, base.schemastaging.context_name.pronunciation, g.125_l37ly
Barred spiral galaxy, astronomy.galaxy_classification_code.galaxy_shape, SB(s)m pec
SBc, astronomy.galaxy_classification_code.galaxy_shape, Barred spiral galaxy
SB(s)m pec, astronomy.galaxy_classification_code.galaxy_shape, Barred spiral galaxy

Answer: SB(s)m pec
SBc