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 plays knox overstreet? 
Knowledge Triplets: m.0jx21d, film.performance.actor, Josh Charles
Film character, type.type.properties, Portrayed in films
Character, owl#inverseOf, Portrayed in films
Knox Overstreet, film.performance.character, m.0jx21d
Knox Overstreet, film.film_character.portrayed_in_films, m.0jx21d
Fictional Character, freebase.type_hints.included_types, Topic
Character, type.property.reverse_property, Portrayed in films
Film character, freebase.type_profile.kind, Portrayal
Film character, freebase.type_profile.strict_included_types, Fictional Character
Fictional Character, freebase.type_profile.kind, Portrayal
Film character, freebase.type_profile.kind, Annotation
m.0jx21d, film.performance.film, Dead Poets Society
Film character, common.topic.article, m.02_96_z
Fictional Character, freebase.type_profile.strict_included_types, Topic
Character, rdf-schema#range, Film character
Film character, type.type.expected_by, Other conquests
m.0jx21d, film.performance.character, Knox Overstreet
Josh Charles, film.actor.film, m.0jx21d
m.0jx21d, film.performance.actor, Josh Charles
Fictional Character, freebase.type_profile.published, Published
Film character, type.type.properties, Portrayed in films (dubbed)
Knox Overstreet, common.topic.notable_types, Film character
Film character, freebase.type_profile.strict_included_types, Topic
Dead Poets Society, film.film.starring, m.0jx21d
Film character, type.type.expected_by, Character
Film character, freebase.type_hints.included_types, Topic
Character, type.property.expected_type, Film character
Film character, freebase.type_profile.published, Published
Film character, freebase.type_hints.included_types, Fictional Character
Film character, type.type.expected_by, Killed by
Film character, type.type.expected_by, Character using Wham-O product
Film character, type.type.domain, Film
Knox Overstreet, common.topic.notable_for, g.125fszykz

Answer: Josh Charles