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: When was the president who once held the title U.S. Attorney for the Northern District of Georgia" nominated? 
Knowledge Triplets: United States presidential inauguration, time.recurring_event.instances, Ronald Reagan 1981 presidential inauguration
Ronald Reagan 1981 presidential inauguration, base.culturalevent.event.entity_involved, Ronald Reagan
Washington, D.C., location.location.events, Ronald Reagan 1985 presidential inauguration
Ronald Reagan 1985 presidential inauguration, time.event.locations, United States Capitol
U.S. Attorney for the Northern District of Georgia, government.government_office_or_title.office_holders, m.04kmvm1
Government Office or Title, type.type.properties, Governmental body (if any)
Government Office or Title, type.type.expected_by, Office, Position, or Title
Ronald Reagan 1985 presidential inauguration, base.culturalevent.event.event_type, Historical event
Ronald Reagan 1981 presidential inauguration, time.event.locations, United States Capitol
Topic, freebase.type_profile.published, Published
Bob Barr, government.politician.government_positions_held, m.0459wjc
Ronald Reagan 1985 presidential inauguration, base.inaugurations.inauguration.inaugural_address, Second Inaugural Address of Ronald Reagan
Ronald Reagan 1985 presidential inauguration, time.event.locations, White House
Washington, D.C., location.location.events, Ronald Reagan 1981 presidential inauguration
Ronald Reagan 1981 presidential inauguration, time.event.start_date, 1981-01-20
Office, position, or title, type.property.reverse_property, Office Holders
Government Office or Title, type.type.properties, Office Holders
Ronald Reagan 1985 presidential inauguration, time.event.end_date, 1985-01-21
Government Office or Title, freebase.type_profile.strict_included_types, Topic
Ronald Reagan 1985 presidential inauguration, base.culturalevent.event.entity_involved, Ronald Reagan
United States presidential inauguration, time.recurring_event.instances, Ronald Reagan 1985 presidential inauguration
m.05c0rxl, dataworld.gardening_hint.replaced_by, Ronald Reagan 1985 presidential inauguration
Ronald Reagan 1981 presidential inauguration, symbols.namesake.named_after, Ronald Reagan
m.0n5qh2k, dataworld.gardening_hint.last_referenced_by, Ronald Reagan 1981 presidential inauguration
U.S. Attorney for the Northern District of Georgia, government.government_office_or_title.office_holders, m.0459wjc
United States Capitol, location.location.events, Ronald Reagan 1981 presidential inauguration
Office, position, or title, rdf-schema#range, Government Office or Title
United States Capitol, location.location.events, Ronald Reagan 1985 presidential inauguration
White House, location.location.events, Ronald Reagan 1985 presidential inauguration
Government Office or Title, type.type.expected_by, Government positions
Ronald Reagan, base.inaugurations.inauguration_speaker.inauguration, Ronald Reagan 1981 presidential inauguration
U.S. Attorney for the Northern District of Georgia, common.topic.notable_types, Government Office or Title
Ronald Reagan 1985 presidential inauguration, time.event.locations, Washington, D.C.
m.04kmvm1, government.government_position_held.office_holder, Larry D. Thompson
m.0459wjc, government.government_position_held.appointed_by, Ronald Reagan
Ronald Reagan 1981 presidential inauguration, base.inaugurations.inauguration.president, Ronald Reagan
Ronald Reagan 1981 presidential inauguration, base.inaugurations.inauguration.inaugural_address, First Inaugural address of Ronald Reagan
Ronald Reagan 1985 presidential inauguration, base.inaugurations.inauguration.president, Ronald Reagan
m.0459wjc, government.government_position_held.appointed_by, Ronald Reagan
Ronald Reagan 1981 presidential inauguration, time.event.end_date, 1981-01-20
Government Office or Title, type.type.domain, Government
Ronald Reagan 1981 presidential inauguration, base.culturalevent.event.event_type, Historical event
Office, position, or title, owl#inverseOf, Office Holders
Ronald Reagan 1985 presidential inauguration, time.event.instance_of_recurring_event, United States presidential inauguration
Government Office or Title, freebase.type_hints.included_types, Topic
Government Office or Title, common.topic.article, m.02xlj1v
Ronald Reagan, symbols.name_source.namesakes, Ronald Reagan 1981 presidential inauguration
Larry D. Thompson, government.politician.government_positions_held, m.04kmvm1
m.04kmvm1, government.government_position_held.office_position_or_title, U.S. Attorney for the Northern District of Georgia
Government Office or Title, type.type.expected_by, Office
Government Office or Title, type.type.properties, Category
Office, position, or title, type.property.expected_type, Government Office or Title
m.0459wjc, government.government_position_held.office_position_or_title, U.S. Attorney for the Northern District of Georgia
Government Office or Title, type.type.expected_by, Title of Chief Executive
Ronald Reagan, base.inaugurations.inauguration.president, Ronald Reagan 1985 presidential inauguration
Ronald Reagan, symbols.namesake.named_after, Ronald Reagan 1981 presidential inauguration
Ronald Reagan 1985 presidential inauguration, time.event.start_date, 1985-01-20
Ronald Reagan, base.inaugurations.inauguration_speaker.inauguration, Ronald Reagan 1985 presidential inauguration
Government Office or Title, freebase.type_profile.published, Published
Government Office or Title, type.type.expected_by, Offices/Positions Within the Body
m.0459wjc, government.government_position_held.office_holder, Bob Barr
Ronald Reagan 1981 presidential inauguration, time.event.instance_of_recurring_event, United States presidential inauguration
U.S. Attorney for the Northern District of Georgia, government.government_office_or_title.office_holders, m.0459wjc
Government Office or Title, type.type.expected_by, Office, position, or title
Government Office or Title, freebase.type_profile.kind, Definition
Government Office or Title, freebase.type_profile.strict_included_types, Non-Agent
First Inaugural address of Ronald Reagan, base.inaugurations.inaugural_speech.inauguration, Ronald Reagan 1981 presidential inauguration
m.05c1r_h, dataworld.gardening_hint.replaced_by, Ronald Reagan 1981 presidential inauguration
Government Office or Title, type.type.expected_by, Offices
U.S. Attorney for the Northern District of Georgia, common.topic.notable_for, g.1255nb0yy
Ronald Reagan 1981 presidential inauguration, time.event.locations, Washington, D.C.
Government Office or Title, freebase.type_profile.strict_included_types, Abstract
Second Inaugural Address of Ronald Reagan, base.inaugurations.inaugural_speech.inauguration, Ronald Reagan 1985 presidential inauguration
Government Office or Title, type.type.properties, Jurisdiction
Ronald Reagan, government.political_appointer.appointees, m.0459wjc

Answer: Ronald Reagan 1981 presidential inauguration
Ronald Reagan 1985 presidential inauguration