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: who played bernie focker? 
Knowledge Triplets: Character, type.property.expected_type, Film character
m.087gyq_, film.performance.character, Bernie Focker
m.0k0kj9, film.performance.character, Bernie Focker
Bernie Focker, common.topic.article, m.087h3yl
Film character, type.type.expected_by, Character using Wham-O product
Fictional Character, freebase.type_profile.kind, Portrayal
Meet the Fockers, film.film.sequel, Little Fockers
Film character, freebase.type_profile.kind, Portrayal
Character, owl#inverseOf, Portrayed in films
Bernie Focker, film.film_character.portrayed_in_films, m.087gyq_
m.087gyq_, film.performance.film, Little Fockers
m.0k0kj9, film.performance.film, Meet the Fockers
Character, rdf-schema#range, Film character
Dustin Hoffman, film.actor.film, m.0k0kj9
m.0k0kj9, film.performance.actor, Dustin Hoffman
Film character, type.type.expected_by, Character
m.087gyq_, film.actor.film, Dustin Hoffman
Fictional Character, freebase.type_hints.included_types, Topic
Bernie Focker, film.film_character.portrayed_in_films, m.0k0kj9
Film character, freebase.type_profile.strict_included_types, Fictional Character
Character, type.property.reverse_property, Portrayed in films
Bernie Focker, common.topic.notable_types, Film character
Fictional Character, freebase.type_profile.strict_included_types, Topic
m.087h3yl, common.document.content, m.087h3xk
m.087gyq_, film.performance.actor, Dustin Hoffman
Bernie Focker, common.topic.notable_for, g.125fl_f32
m.0k0kj9, film.actor.film, Dustin Hoffman
Film character, freebase.type_profile.kind, Annotation
Film character, type.type.expected_by, Other conquests
Little Fockers, film.film.prequel, Meet the Fockers
Film character, type.type.expected_by, Killed by
Film character, freebase.type_hints.included_types, Fictional Character
Film character, freebase.type_profile.strict_included_types, Topic
Film character, common.topic.article, m.02_96_z
Film character, freebase.type_hints.included_types, Topic
Fictional Character, freebase.type_profile.published, Published
Film character, type.type.domain, Film
Dustin Hoffman, film.actor.film, m.087gyq_
Film character, type.type.properties, Portrayed in films (dubbed)
Meet the Fockers, film.film.starring, m.0k0kj9
Film character, type.type.properties, Portrayed in films
Film character, freebase.type_profile.published, Published
Bernie Focker, film.performance.character, m.0k0kj9
Bernie Focker, film.performance.character, m.087gyq_

Answer: Dustin Hoffman