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: What ethnicity is the actor who portrayed a character named Petty Officer Cora "Weps" Raikes? 
Knowledge Triplets: Character, owl#inverseOf, Portrayed in films
Film character, freebase.type_profile.strict_included_types, Topic
Film character, type.type.expected_by, Character
Rihanna, people.person.ethnicity, Afro-Guyanese
Afro-American peoples of the Americas, people.ethnicity.includes_groups, Afro-Guyanese
Rihanna, film.actor.film, m.0gvywlx
Afro-Guyanese, user.avh.default_domain.ellerdale_topic.ellerdale_id, 00a0-6334
Film character, freebase.type_profile.kind, Annotation
Petty Officer Cora 'Weps' Raikes, common.topic.notable_types, Film character
Petty Officer Cora 'Weps' Raikes, common.topic.notable_for, g.1255gdbkr
Film character, common.topic.article, m.02_96_z
Film character, type.type.domain, Film
Phil Lynott, people.person.ethnicity, Afro-Guyanese
Ptolemy Reid, people.person.ethnicity, Afro-Guyanese
m.0gvywlx, film.performance.actor, Rihanna
Topic, freebase.type_profile.kind, Portrayal
Afro-Guyanese, people.ethnicity.languages_spoken, Guyanese Creole English Language
Character, rdf-schema#range, Film character
Fictional Character, freebase.type_profile.kind, Portrayal
Character, type.property.reverse_property, Portrayed in films
Film character, type.type.properties, Portrayed in films
Afro-Guyanese, people.ethnicity.people, Forbes Burnham
Film character, type.type.expected_by, Killed by
Film, type.domain.types, Film character
Afro-Guyanese, people.ethnicity.included_in_group, Africans
Character, type.property.expected_type, Film character
Eon Sinclair, people.person.ethnicity, Afro-Guyanese
Afro-Guyanese, people.ethnicity.people, Phil Lynott
m.0gvywlx, film.performance.actor, Rihanna
Africans, people.ethnicity.includes_groups, Afro-Guyanese
Topic, freebase.type_profile.published, Published
Sam Hinds, people.person.ethnicity, Afro-Guyanese
Fictional Character, freebase.type_profile.strict_included_types, Topic
Afro-Guyanese, people.ethnicity.people, Eon Sinclair
Afro-Guyanese, people.ethnicity.people, Eusi Kwayana
Fictional Character, freebase.type_hints.included_types, Topic
m.0gvywlx, film.performance.film, Battleship
Eusi Kwayana, people.person.ethnicity, Afro-Guyanese
Forbes Burnham, people.person.ethnicity, Afro-Guyanese
Film character, type.type.expected_by, Other conquests
Afro-Guyanese, people.ethnicity.people, Red Café
Red Café, people.person.ethnicity, Afro-Guyanese
Film character, freebase.type_hints.included_types, Topic
Petty Officer Cora 'Weps' Raikes, film.performance.character, m.0gvywlx
Afro-Guyanese, people.ethnicity.languages_spoken, English Language
Film character, freebase.type_hints.included_types, Fictional Character
Afro-Guyanese, people.ethnicity.included_in_group, Afro-American peoples of the Americas
Fictional Character, freebase.type_profile.published, Published
Film character, type.type.expected_by, Character using Wham-O product
Afro-Guyanese, people.ethnicity.people, Rihanna
Afro-Guyanese, people.ethnicity.people, Ptolemy Reid
Film character, freebase.type_profile.strict_included_types, Fictional Character
Rihanna, people.ethnicity.people, Afro-Guyanese
Petty Officer Cora 'Weps' Raikes, film.film_character.portrayed_in_films, m.0gvywlx
Afro-Guyanese, people.ethnicity.people, Sam Hinds
Film character, type.type.properties, Portrayed in films (dubbed)
Film character, freebase.type_profile.published, Published
m.0gvywlx, film.performance.character, Petty Officer Cora 'Weps' Raikes
Film character, freebase.type_profile.kind, Portrayal

Answer: Afro-Guyanese