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 is the australian open called? 
Knowledge Triplets: Date of final occurrence, rdf-schema#domain, Recurring event
Recurring event, freebase.type_profile.strict_included_types, Topic
Instance of recurring event, type.property.reverse_property, Instances
Current frequency, rdf-schema#domain, Recurring event
Australian Open, time.recurring_event.date_of_first_occurance, 1904
Date of first occurrence, rdf-schema#domain, Recurring event
Instance of recurring event, type.property.expected_type, Recurring event
Date of first occurrence, type.property.schema, Recurring event
Recurring event, type.type.expected_by, Recurring event
Recurring event, freebase.type_hints.included_types, Topic
Recurring event, freebase.type_profile.kind, Description
Current frequency, type.property.schema, Recurring event
Recurring event, type.type.domain, Event
Recurring event, freebase.type_profile.strict_included_types, Non-Agent
Instance of recurring event, rdf-schema#range, Recurring event
Recurring event, type.type.properties, Date of first occurrence
Instance of recurring event, owl#inverseOf, Instances
Recurring event, freebase.type_profile.strict_included_types, Abstract
Recurring event, type.type.properties, Current frequency
Australian Open, common.topic.notable_for, g.125g6zvym
Recurring event, type.type.expected_by, Instance of recurring horse race
Recurring event, type.type.properties, Instances
Date of final occurrence, type.property.schema, Recurring event
Australian Open, common.topic.notable_types, Recurring event
Recurring event, common.topic.article, m.063x5__
Recurring event, type.type.expected_by, Instance of recurring event
Recurring event, type.type.properties, Date of final occurrence
Recurring event, freebase.type_profile.strict_included_types, Inanimate
Australian Open, common.topic.article, m.05ftlm

Answer: Australian Open