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 invention was made by the topic in the image Whitney-Eli-LOC? 
Knowledge Triplets: Eli Whitney, base.kwebbase.kwtopic.connections_to, thomas blanchard work related to eli whitney
Eli Whitney, base.kwebbase.kwtopic.has_sentences, Whitney became one of the most celebrated inventors of the United States.
Eli Whitney, base.kwebbase.kwtopic.has_sentences, He developed the machinery needed to produce the parts, which could be operated by unskilled workmen.
Eli Whitney, people.deceased_person.cause_of_death, Prostate cancer
Whitney-Eli-LOC, common.topic.image, Eli Whitney
Once the initial problems had been solved, Whitney was able to develop even more efficient production techniques., base.kwebbase.kwsentence.previous_sentence, Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing.
His friend, Oliver Wolcott, then Secretary of the Treasury, arranged a contract based on Whitney's proposal to manufacture interchangeable parts., base.kwebbase.kwsentence.next_sentence, He developed the machinery needed to produce the parts, which could be operated by unskilled workmen.
eli whitney work related to isaac merritt singer, base.kwebbase.kwconnection.subject, Eli Whitney
Inventor, freebase.type_profile.equivalent_topic, Inventor
Eli Whitney, base.kwebbase.kwtopic.connections_to, simeon north parallel work with eli whitney
Eli Whitney, symbols.name_source.namesakes, Eli Whitney Students Program
Eli Whitney, law.inventor.inventions, Cotton gin
eli terry possibly influenced by eli whitney, base.kwebbase.kwconnection.other, Eli Whitney
Eli Whitney, base.argumentmaps.innovator.original_ideas, Cotton gin
Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing., base.kwebbase.kwsentence.kwtopic, Eli Whitney
Westborough, location.location.people_born_here, Eli Whitney
Cotton gin, law.invention.inventor, Eli Whitney
Eli Whitney, people.person.education, m.0_g74ns
Eli Whitney engraving from 1846 memoir, common.image.appears_in_topic_gallery, Eli Whitney
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney work related to isaac merritt singer
Eli Whitney, common.topic.image, Whitney-Eli-LOC
Eli Whitney, people.deceased_person.place_of_burial, Grove Street Cemetery
Eli Whitney Museum, symbols.namesake.named_after, Eli Whitney
New Haven, location.hud_county_place.place, New Haven
Grove Street Cemetery, location.location.containedby, New Haven
Inventor, freebase.equivalent_topic.equivalent_type, Inventor
eli whitney work related to eli terry, base.kwebbase.kwconnection.subject, Eli Whitney
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney work related to samuel colt
Eli Whitney, common.topic.article, m.02nc_
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney work related to thomas blanchard
Eli Whitney, people.person.nationality, United States of America
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney work related to chauncey jerome
Whitney-Eli-LOC, common.image.appears_in_topic_gallery, Eli Whitney
Eli Whitney, symbols.name_source.namesakes, Eli Whitney Museum
United States of America, base.biblioness.bibs_topic.is_really, United States of America
Eli Whitney, common.topic.image, Eli Whitney engraving from 1846 memoir
m.03pfqsk, people.place_lived.person, Eli Whitney
Eli Whitney, people.person.profession, Teacher
Eli Whitney, base.kwebbase.kwtopic.connections_to, chauncey jerome used techniques of eli whitney
Whitney Gin, common.image.appears_in_topic_gallery, Eli Whitney
Eli Whitney, law.invention.inventor, Milling
Once the initial problems had been solved, Whitney was able to develop even more efficient production techniques., base.kwebbase.kwsentence.kwtopic, Eli Whitney
Eli Whitney, people.person.gender, Male
Eli Whitney, base.kwebbase.kwtopic.connections_to, thomas jefferson met eli whitney
Eli Whitney, people.person.profession, Engineer
Eli Whitney, common.topic.image, Whitney Gin
Eli Whitney, law.invention.inventor, Interchangeable parts
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney work related to simeon north
Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing., base.kwebbase.kwsentence.next_sentence, Once the initial problems had been solved, Whitney was able to develop even more efficient production techniques.
simeon north parallel work with eli whitney, base.kwebbase.kwconnection.other, Eli Whitney
He developed the machinery needed to produce the parts, which could be operated by unskilled workmen., base.kwebbase.kwsentence.next_sentence, Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing.
Interchangeable parts, law.invention.inventor, Eli Whitney
Westborough, location.location.containedby, United States of America
Eli Whitney Students Program, symbols.namesake.named_after, Eli Whitney
samuel colt employed eli whitney, base.kwebbase.kwconnection.other, Eli Whitney
chauncey jerome used techniques of eli whitney, base.kwebbase.kwconnection.other, Eli Whitney
With a possible war with France looming, America urgently needed muskets., base.kwebbase.kwsentence.kwtopic, Eli Whitney
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney supported by thomas jefferson
eli whitney work related to simeon north, base.kwebbase.kwconnection.subject, Eli Whitney
Eli Whitney, people.person.education, m.0cpkdcb
Male, medicine.risk_factor.diseases, Prostate cancer
United States of America, base.biblioness.bibs_topic.subsumes, United States of America
eli whitney work related to chauncey jerome, base.kwebbase.kwconnection.subject, Eli Whitney
New Haven, location.location.containedby, United States of America
Eli Whitney, people.person.place_of_birth, Westborough
Whitney became one of the most celebrated inventors of the United States., base.kwebbase.kwsentence.kwtopic, Eli Whitney
Eli Whitney, people.person.profession, Inventor
New Haven, base.biblioness.bibs_location.country, United States of America
Whitney family, people.family.members, Eli Whitney
Eli Whitney, base.kwebbase.kwtopic.connections_to, eli terry possibly influenced by eli whitney
Eli Whitney, law.inventor.inventions, Interchangeable parts
Whitney-Eli-LOC, common.image.size, m.02bdh7d
He developed the machinery needed to produce the parts, which could be operated by unskilled workmen., base.kwebbase.kwsentence.kwtopic, Eli Whitney
eli whitney supported by thomas jefferson, base.kwebbase.kwconnection.subject, Eli Whitney
Eli Whitney, base.kwebbase.kwtopic.has_sentences, Once the initial problems had been solved, Whitney was able to develop even more efficient production techniques.
Eli Whitney, base.kwebbase.kwtopic.has_sentences, Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing.
Eli Whitney, base.kwebbase.kwtopic.connections_from, eli whitney work related to eli terry
eli whitney supported by thomas jefferson, base.kwebbase.kwconnection.sentence, Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing.
eli whitney work related to samuel colt, base.kwebbase.kwconnection.subject, Eli Whitney
m.0_g74ns, education.education.student, Eli Whitney
Eli Whitney, law.inventor.inventions, Milling
Prostate cancer, medicine.disease.risk_factors, Male
Eli Whitney, people.deceased_person.place_of_death, New Haven
Eli Whitney, base.argumentmaps.innovator.original_ideas, Cotton gin
Eli Whitney, common.topic.notable_types, Inventor
Milling, law.invention.inventor, Eli Whitney
Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing., base.kwebbase.kwsentence.previous_sentence, He developed the machinery needed to produce the parts, which could be operated by unskilled workmen.
thomas jefferson met eli whitney, base.kwebbase.kwconnection.other, Eli Whitney
Cotton gin, base.argumentmaps.original_idea.innovator, Eli Whitney
m.0cpkdcb, education.education.student, Eli Whitney
Jefferson provided support and was influential in spreading Whitney's concept throughout American manufacturing., base.kwebbase.kwsentence.contains_connections, eli whitney supported by thomas jefferson
Eli Whitney, base.kwebbase.kwtopic.has_sentences, His friend, Oliver Wolcott, then Secretary of the Treasury, arranged a contract based on Whitney's proposal to manufacture interchangeable parts.
He developed the machinery needed to produce the parts, which could be operated by unskilled workmen., base.kwebbase.kwsentence.previous_sentence, His friend, Oliver Wolcott, then Secretary of the Treasury, arranged a contract based on Whitney's proposal to manufacture interchangeable parts.
His friend, Oliver Wolcott, then Secretary of the Treasury, arranged a contract based on Whitney's proposal to manufacture interchangeable parts., base.kwebbase.kwsentence.kwtopic, Eli Whitney
Eli Whitney, common.topic.notable_for, g.1259fby_h
Eli Whitney, base.kwebbase.kwtopic.connections_to, samuel colt employed eli whitney
Eli Whitney, base.kwebbase.kwtopic.has_sentences, With a possible war with France looming, America urgently needed muskets.
Eli Whitney, people.person.places_lived, m.03pfqsk
Eli Whitney, people.family_member.family, Whitney family
eli whitney work related to thomas blanchard, base.kwebbase.kwconnection.subject, Eli Whitney
thomas blanchard work related to eli whitney, base.kwebbase.kwconnection.other, Eli Whitney

Answer: Milling
Interchangeable parts
Cotton gin