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's the location of the topic of the picture "Rome Colosseum"? 
Knowledge Triplets: Ancient Roman architecture, architecture.architectural_style.examples, Colosseum
Colosseum, common.topic.image, Rome Colosseum
Rome Colosseum, common.image.appears_in_topic_gallery, Colosseum
Vespasian, architecture.architect.structures_designed, Colosseum
Colosseum, location.location.containedby, Rome
Italy, travel.travel_destination.tour_operators, Adventures by Disney - 7-Night Mediterranean Magic Cruise
Rome, location.location.containedby, Italy
Vespasian, people.person.children, Titus
Colosseum, base.ontologies.ontology_instance.equivalent_instances, m.07ngcgn
Initial design and construction of Colosseum, projects.project.project_focus, Colosseum
Rome Colosseum, common.image.appears_in_topic_gallery, Colosseum
Colosseum, travel.tourist_attraction.near_travel_destination, Rome
Colosseum, location.location.geolocation, m.02_dtvp
Colosseum, architecture.structure.architect, Vespasian
Colosseum, common.topic.article, m.0d5r6
Colosseum, architecture.structure.architectural_style, Ancient Roman architecture
m.07ngcgn, base.ontologies.ontology_instance_mapping.freebase_topic, Colosseum
Colosseum, projects.project_focus.projects, Initial design and construction of Colosseum
Colosseum, architecture.building.building_function, Amphitheatre
  Adventures by Disney - 5-Night Mediterranean Magic Cruise, travel.tour_operator.travel_destinations, Italy
Initial design and construction of Colosseum, common.topic.image, Rome Colloseum aeria
Colosseum, common.topic.notable_for, g.1254zttvv
Colosseum, travel.tourist_attraction.near_travel_destination, Rome
Amphitheatre, architecture.building_function.buildings, Colosseum
  Adventures by Disney - 5-Night Mediterranean Magic Cruise, travel.tour_operator.travel_destinations, Colosseum
  Adventures by Disney - 5-Night Mediterranean Magic Cruise, travel.tour_operator.travel_destinations, Rome
Rome, travel.travel_destination.tour_operators, Adventures by Disney - 7-Night Mediterranean Magic Cruise
Rome, travel.travel_destination.tour_operators,   Adventures by Disney - 5-Night Mediterranean Magic Cruise
Italy, travel.travel_destination.tour_operators,   Adventures by Disney - 5-Night Mediterranean Magic Cruise
Italy, location.country.capital, Rome
Rome Colloseum aeria, common.image.appears_in_topic_gallery, Initial design and construction of Colosseum
Colosseum, common.topic.image, Rome Colloseum aeria
Adventures by Disney - 7-Night Mediterranean Magic Cruise, travel.tour_operator.travel_destinations, Rome
Titus, people.person.parents, Vespasian
Adventures by Disney - 7-Night Mediterranean Magic Cruise, travel.tour_operator.travel_destinations, Colosseum
Colosseum, location.location.containedby, Italy
Colosseum, travel.travel_destination.tour_operators, Adventures by Disney - 7-Night Mediterranean Magic Cruise
Colosseum, common.topic.notable_types, Tourist attraction
Rome Colloseum aeria, common.image.appears_in_topic_gallery, Colosseum
Colosseum, base.venuebase.venue.capacity, m.0hxskyd
Titus, people.person.place_of_birth, Rome
Rome, travel.travel_destination.tourist_attractions, Colosseum
Colosseum, travel.travel_destination.tour_operators,   Adventures by Disney - 5-Night Mediterranean Magic Cruise
Rome, base.biblioness.bibs_location.country, Italy
Titus, architecture.architect.structures_designed, Colosseum
Colosseum, location.location.containedby, Italy
Adventures by Disney - 7-Night Mediterranean Magic Cruise, travel.tour_operator.travel_destinations, Italy
Rome Colosseum, common.image.size, m.029mrvc
Colosseum, architecture.structure.architect, Titus

Answer: Italy
Rome