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: l6 is what engine? 
Knowledge Triplets: m.0tj0s2f, dataworld.gardening_hint.last_referenced_by, m.0gwxgzj
Straight-six engine, automotive.engine_type.used_in, BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.torque_ft_lbs, 300.0
m.04mw88z, dataworld.gardening_hint.replaced_by, BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo
m.0gwxgzj, type.object.permission, m.019h
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.fuels_used, Gasoline
m.01314_ym, base.schemastaging.pronunciation.yomigana, ちょくれつ6きとう
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.horsepower, 300.0
Straight-six engine, base.schemastaging.context_name.pronunciation, m.01314_ym
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.size_in_liters, 3.0
Straight-six engine, user.avh.default_domain.ellerdale_topic.ellerdale_id, 0081-7008
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.engine_type, Straight-six engine
Gasoline, automotive.fuel.engines, BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo
m.0gwxgzj, dataworld.gardening_hint.last_referenced_by, Straight-six engine
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.fuel_delivery, Turbocharger
m.019h, type.permission.controls, m.0gwxgzj
BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo, automotive.engine.fuel_delivery, Fuel injection

Answer: BMW 3.0L 6 cylinder 300 hp 300 ft-lbs Turbo