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 did the person who invented the water frame contribute to the industrial revolution? 
Knowledge Triplets: Topic, freebase.type_profile.published, Published
Richard Arkwright, law.inventor.us_patents, Water frame
Richard Arkwright, common.topic.image, Richard Arkwright
Inventor, type.type.domain, Law
Water frame, common.topic.notable_for, g.125by3b19
Invention, freebase.type_profile.strict_included_types, Non-Agent
Invention, freebase.type_profile.equivalent_topic, Invention
Inventor, freebase.type_profile.published, Published
Richard Arkwright, common.topic.notable_types, Inventor
Inventor, type.type.properties, Inventions
Richard Arkwright, people.person.place_of_birth, Preston, Lancashire
Richard Arkwright, people.person.gender, Male
Waterframe, common.image.appears_in_topic_gallery, Water frame
Preston, Lancashire, location.location.containedby, England
Richard Arkwright, freebase.valuenotation.is_reviewed, Date of birth
Invention, type.type.domain, Law
Inventor, freebase.equivalent_topic.equivalent_type, Inventor
Richard Arkwright, people.person.children, Susanna Arkwright
Water frame, common.topic.notable_types, Invention
Richard Arkwright, people.person.nationality, England
Water frame, law.inventor.inventions, Richard Arkwright
m.0j6g7p8, people.marriage.spouse, Richard Arkwright
Richard Arkwright, people.person.profession, Inventor
Richard Arkwright, people.person.profession, Industrialist
Water frame, law.us_patent.inventor, Richard Arkwright
m.0j6fnmw, people.marriage.spouse, Richard Arkwright
Industrialist, people.profession.people_with_this_profession, Richard Arkwright
Invention, freebase.type_profile.kind, Definition
Invention, type.type.properties, Patents
Invention, type.type.expected_by, Associated Inventions
Inventor, freebase.type_profile.strict_included_types, Topic
Invention, type.type.properties, Date of invention
Inventor, freebase.type_hints.included_types, Topic
Richard Arkwright, people.person.spouse_s, m.0j6g7p8
Richard Arkwright, people.person.profession, Entrepreneur
Richard Arkwright, people.person.children, Richard Arkwright junior
Water frame, common.topic.article, m.03lqnv
Invention, freebase.type_profile.published, Published
Invention, common.topic.article, m.0dgm6_m
Richard Arkwright, common.topic.notable_for, g.1257c2w3h
Richard Arkwright, law.inventor.inventions, Spinning frame
Water frame, common.topic.image, Waterframe
Richard Arkwright, common.topic.article, m.01tglr
Invention, type.type.expected_by, Inventions
Richard Arkwright, law.inventor.inventions, Water frame
Inventor, type.type.expected_by, Inventor
Waterframe, common.image.size, m.0kj_f0
Invention, type.type.properties, Inventor
Richard Arkwright, people.person.spouse_s, m.0j6fnmw
Invention, freebase.type_hints.included_types, Topic
Richard Arkwright, people.deceased_person.place_of_death, Cromford
Invention, freebase.type_profile.strict_included_types, Topic
Richard Arkwright, common.topic.image, Arkwright Richard 1790
Richard Arkwright, law.inventor.inventions, Spinning frame
Inventor, freebase.type_profile.equivalent_topic, Inventor
Water frame, law.invention.inventor, Richard Arkwright

Answer: Water frame
Spinning frame