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: the proceedings of the fourth international partners in flight conference: tundra to tropic has what conference event? 
Knowledge Triplets: m.0dl75x8, base.partnersinflight.population_estimate.source, Terrell D. Rich
Dean W. Demarest, book.author.works_written, The Partners in Flight Handbook on Species Assessment
Dean W. Demarest, organization.organization_member.committees_served_on, m.052t11v
The Partners in Flight Handbook on Species Assessment, book.written_work.author, Terrell D. Rich
m.05z1xhr, base.litcentral.person_full_name.person_topic, Dean W. Demarest
The Partners in Flight Handbook on Species Assessment, book.written_work.author, Dean W. Demarest
Terrell D. Rich, book.author.works_edited, Partners in Flight Monitoring Needs Assessment Summary
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, conferences.conference_proceedings.conference, Fourth International Partners in Flight Conference
Tundra to Tropics: Connecting Birds, Habitats and People, Proceedings of the Fourth International Partners in Flight Conference, book.publication.contents, m.010b5xqq
Terrell D. Rich, book.author.works_edited, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
Dean W. Demarest, book.author.works_edited, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
Terrell D. Rich, book.author.works_written, Partners in Flight North American Landbird Conservation Plan
Terrell D. Rich, book.author.works_written, High Priority Needs for Range-wide Monitoring of North American Landbirds
Dean W. Demarest, people.person.gender, Male
Dean W. Demarest, organization.organization_member.member_of, m.04zk1zv
m.05ysl2t, organization.organization_committee_membership.member, Dean W. Demarest
Dean W. Demarest, organization.organization_member.committees_served_on, m.052pt52
High Priority Needs for Range-wide Monitoring of North American Landbirds, book.written_work.author, Terrell D. Rich
Partners in Flight Monitoring Needs Assessment Summary, book.written_work.editor, Terrell D. Rich
High Priority Needs for Range-wide Monitoring of North American Landbirds, book.written_work.author, Dean W. Demarest
Dean W. Demarest, book.author.works_written, High Priority Needs for Range-wide Monitoring of North American Landbirds
Dean W. Demarest, organization.organization_member.committees_served_on, m.05ysl2t
Terrell D. Rich, book.author.works_written, The Partners in Flight Handbook on Species Assessment
Terrell D. Rich, people.person.gender, Male
m.04zk1tg, organization.organization_board_membership.member, Terrell D. Rich
Dean W. Demarest, people.person.employment_history, m.04sxfjb
m.0fpqqwx, base.partnersinflight.population_estimate.source, Terrell D. Rich
m.04xh26v, business.employment_tenure.person, Terrell D. Rich
Fourth International Partners in Flight Conference, conferences.conference.proceedings, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
Tundra to Tropics: Connecting Birds, Habitats and People, Proceedings of the Fourth International Partners in Flight Conference, book.book_edition.book, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
Craig Thompson, book.author.works_edited, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
Terrell D. Rich, business.board_member.organization_board_memberships, m.04zk1b7
Partners in Flight North American Landbird Conservation Plan, book.written_work.author, Terrell D. Rich
Proceedings of the International Partners in Flight Conferences, book.literary_series.works_in_this_series, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.written_work.editor, Ma. del Coro Arizmendi
m.052t11v, organization.organization_committee_membership.member, Dean W. Demarest
m.04sxfjb, business.employment_tenure.person, Dean W. Demarest
Dean W. Demarest, base.litcentral.named_person.individual_names, m.05z1xhr
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.written_work.editor, Craig Thompson
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.written_work.editor, Dean W. Demarest
m.04zk1zv, organization.organization_membership.member, Dean W. Demarest
Terrell D. Rich, business.board_member.organization_board_memberships, m.04zk1tg
m.04zk1b7, organization.organization_board_membership.member, Terrell D. Rich
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.written_work.editor, Terrell D. Rich
Ma. del Coro Arizmendi, book.author.works_edited, Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic
m.0dl75rd, base.partnersinflight.population_estimate.source, Terrell D. Rich
m.052pt52, organization.organization_committee_membership.member, Dean W. Demarest
Terrell D. Rich, people.person.employment_history, m.04xh26v
m.0dl75vh, base.partnersinflight.population_estimate.source, Terrell D. Rich
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.written_work.part_of_series, Proceedings of the International Partners in Flight Conferences
m.010b5xqq, book.contents.publication, Tundra to Tropics: Connecting Birds, Habitats and People, Proceedings of the Fourth International Partners in Flight Conference
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.written_work.date_of_first_publication, 2009
Proceedings of the Fourth International Partners in Flight Conference: Tundra to Tropic, book.book.editions, Tundra to Tropics: Connecting Birds, Habitats and People, Proceedings of the Fourth International Partners in Flight Conference

Answer: Fourth International Partners in Flight Conference