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: who was president after william henry harrison? 
Knowledge Triplets: US President, freebase.type_profile.equivalent_topic, President of the United States
James Madison, common.topic.notable_types, US President
President, organization.role.leaders, m.011sh1kx
President of the United States, book.book_subject.works, First Off the Tee: Presidential Hackers, Duffers, and Cheaters From Taft to Bush
President of the United States, book.book_subject.works, Presidential Leadership: Rating the Best and the Worst in the White House
William Henry Harrison, people.person.nationality, United States of America
m.012vl0sx, organization.leadership.role, President
m.011rd41j, organization.leadership.role, President
President of the United States, book.book_subject.works, What Do We Do Now?: A Workbook for the President-elect
President of the United States, base.firsts.achievement.firsts, m.08ntjg4
Andrew Jackson, government.us_president.vice_president, Martin Van Buren
No man will ever bring out of the Presidency the reputation which carries him into it., media_common.quotation.author, Thomas Jefferson
US President, freebase.type_profile.kind, Significant
m.011clphx, organization.leadership.role, President
George Washington, government.us_president.vice_president, John Adams
John Tyler, government.us_vice_president.to_president, William Henry Harrison
James K. Polk, common.topic.notable_types, US President
President of the United States, government.government_office_or_title.office_holders, m.03fx7zy
President, organization.role.leaders, m.011nqhd1
m.01317kmv, organization.leadership.role, President
John Adams, government.us_vice_president.to_president, George Washington
President, media_common.quotation_subject.quotations_about_this_subject, When I was a boy I was told that anybody could become President. Now I'm beginning to believe it.
m.011p3r_p, organization.leadership.role, President
Franklin D. Roosevelt, people.person.nationality, United States of America
m.09xm5ms, common.webpage.topic, President
President, organization.role.leaders, m.012sr44f
William Henry Harrison, common.topic.notable_types, US President
President of the United States, government.government_office_or_title.office_holders, m.03fx7j8
m.010vy_0c, organization.leadership.role, President
William McKinley, people.person.nationality, United States of America
President of the United States, government.government_office_or_title.office_holders, m.04466xm
US President, common.topic.article, m.03yy9v6
Conrad Dalton, fictional_universe.fictional_character.occupation, President of the United States
m.012dv8px, organization.leadership.role, President
William Henry Harrison, government.politician.government_positions_held, m.03fx87q
m.010x4k8d, organization.leadership.role, President
Thomas Jefferson, people.person.nationality, United States of America
President of the United States, common.topic.webpage, m.09y93hy
President, organization.role.leaders, m.01317kmv
Vice president, rdf-schema#domain, US President
President of the United States, base.firsts.achievement.firsts, m.04wrwjv
President of the United States, government.government_office_or_title.office_holders, m.04466xb
m.012nxsv7, organization.leadership.role, President
Josiah Bartlet, fictional_universe.fictional_character.occupation, President of the United States
m.0hj2q2k, organization.leadership.role, President
President, fictional_universe.character_occupation.characters_with_this_occupation, Amber Ericcs
President, common.topic.notable_types, Fictional job title
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, President Thomas Westwood
m.09ygxjq, common.webpage.topic, President of the United States
m.011qjlzn, organization.leadership.role, President
President of the United States, common.topic.webpage, m.09ygxjq
President Thomas Westwood, common.topic.notable_types, TV Character
President of the United States, government.government_office_or_title.office_holders, m.04469xv
John Quincy Adams, common.topic.notable_types, US President
m.011x1m4k, organization.leadership.role, President
President, organization.role.leaders, m.012dv8pl
US President, type.type.expected_by, US Presidents
m.011cn57h, organization.leadership.role, President
President of the United States, book.book_subject.works, President Pennybaker
President, organization.role.leaders, m.01142cy8
m.0115g4sz, organization.leadership.role, President
John F. Kennedy, government.us_president.vice_president, Lyndon B. Johnson
President of the United States, base.schemastaging.context_name.plural, m.0w0qt9b
President, fictional_universe.character_occupation.characters_with_this_occupation, Laura Roslin
m.011byq3j, organization.leadership.role, President
The Rhetorical Presidency, book.written_work.subjects, President of the United States
President, common.topic.webpage, m.09wsrb0
President, organization.role.leaders, m.0110_fhv
President of the United States, government.government_office_or_title.office_holders, m.04466xz
President, organization.role.leaders, m.011qjlzn
Lyndon B. Johnson, common.topic.notable_types, US President
President of the United States, base.firsts.achievement.firsts, m.04wrx4g
m.011mdkxn, organization.leadership.role, President
George W. Bush, common.topic.notable_types, US President
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Josiah Bartlet
President number, rdf-schema#domain, US President
m.010vyf9y, organization.leadership.role, President
m.011cn40s, organization.leadership.role, President
President, organization.role.leaders, m.011cn40s
m.011nqhd1, organization.leadership.role, President
President number, type.property.schema, US President
President, organization.role.leaders, m.011xd0mq
President, common.topic.webpage, m.09w3vlb
President, common.topic.subjects, MA$TADON
President of the United States, government.government_office_or_title.office_holders, m.03fx8bt
Harry S. Truman, common.topic.notable_types, US President
President of the United States, book.book_subject.works, The Moral Rhetoric of American Presidents
m.0b46f7h, common.webpage.topic, President of the United States
President, organization.role.leaders, m.0129f72l
President, organization.role.leaders, m.011mdkxn
Presidential Command: Power, Leadership, and the Making of Foreign Policy from Richard Nixon to George W. Bush, book.written_work.author, Peter Rodman
William McKinley, government.us_president.vice_president, Theodore Roosevelt
US President, freebase.type_profile.strict_included_types, Topic
m.09ynr7x, common.webpage.topic, President of the United States
Richard Nixon, government.us_president.vice_president, Gerald Ford
John Tyler, common.topic.notable_types, US President
John Adams, freebase.valuenotation.is_reviewed, Vice president
m.09wsrb0, common.webpage.topic, President
Warren G. Harding, common.topic.notable_types, US President
Bill Clinton, common.topic.notable_types, US President
President, fictional_universe.character_occupation.characters_with_this_occupation, Vice President Becker
President Pennybaker, common.topic.article, m.065fdnd
m.09y9g34, common.webpage.topic, President of the United States
President of the United States, government.government_office_or_title.office_holders, m.03fx817
William Howard Taft, people.deceased_person.place_of_death, Washington, D.C.
Franklin Pierce, common.topic.notable_types, US President
President of the United States, common.topic.notable_for, g.125734vfj
James A. Garfield, government.us_president.vice_president, Chester A. Arthur
President of the United States, base.schemastaging.context_name.pronunciation, g.125_lw0zw
Calvin Coolidge, common.topic.notable_types, US President
m.0129f72l, organization.leadership.role, President
m.0116yb__, organization.leadership.role, President
President, organization.role.leaders, m.011rd41j
Theodore Roosevelt, people.person.profession, Historian
m.0663zsk, common.webpage.topic, President of the United States
President, fictional_universe.character_occupation.characters_with_this_occupation, President Blake
m.0114pzps, organization.leadership.role, President
m.012dv8pl, organization.leadership.role, President
President of the United States, government.government_office_or_title.category, President
Zachary Taylor, common.topic.notable_types, US President
President of the United States, base.ontologies.ontology_class.equivalent_classes, m.0dj2gvv
m.05ckhcc, common.webpage.topic, President of the United States
President Pennybaker, book.book.interior_illustrations_by, Diane Goode
Gerald Ford, government.us_vice_president.to_president, Richard Nixon
m.010vz03z, organization.leadership.role, President
President of the United States, book.book_subject.works, White House Ghosts: Presidents and Their Speechwriters
George Washington, first President of the United States, common.image.size, m.02f0j1t
President of the United States, government.government_office_or_title.office_holders, m.04469y8
m.010qvq5k, organization.leadership.role, President
Martin Van Buren, common.topic.notable_types, US President
m.09ybsf2, common.webpage.topic, President
m.03fx8bt, government.government_position_held.office_holder, Thomas Jefferson
Grover Cleveland, common.topic.notable_types, US President
Warren G. Harding, government.us_president.vice_president, Calvin Coolidge
Dwight D. Eisenhower, government.us_president.vice_president, Richard Nixon
President, organization.role.leaders, m.0r8vsll
Calvin Coolidge, government.us_vice_president.to_president, Warren G. Harding
Millard Fillmore, common.topic.notable_types, US President
George Washington, first President of the United States, common.image.appears_in_topic_gallery, Town Destroyer
President, organization.role.leaders, m.0hj2q2k
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Mackenzie Allen
President of the United States, people.appointed_role.appointment, m.0c1svhh
President, organization.role.governors, m.012h6rtl
William McKinley, common.topic.notable_types, US President
President Pennybaker, book.written_work.author, Kate Feiffer
President of the United States, book.book_subject.works, Otto Runs for President
m.09wvy_x, common.webpage.topic, President of the United States
Chester A. Arthur, government.us_vice_president.to_president, James A. Garfield
President of the United States, common.topic.article, m.060dd
President of the United States, freebase.type_profile.equivalent_topic, US President
m.09wwq41, common.webpage.topic, President
Ronald Reagan, government.us_president.vice_president, George H. W. Bush
President of the United States, book.book_subject.works, The Rhetorical Presidency
President, organization.role.leaders, m.010vz03z
James A. Garfield, common.topic.notable_types, US President
US President, freebase.type_profile.published, Published
President of the United States, book.book_subject.works, Grace for President
President Pennybaker, book.written_work.subjects, President of the United States
m.010r11r2, organization.leadership.role, President
President of the United States, government.government_office_or_title.office_holders, m.0446bdk
Alan Brinkley, book.author.works_edited, The Reader's Companion to the American Presidency
President of the United States, government.government_office_or_title.office_holders, m.0446bdb
President of the United States, government.government_office_or_title.office_holders, m.03fx8c3
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Matt Santos
Benjamin Harrison, people.person.profession, Politician
President, organization.role.leaders, m.010vy_0c
President, organization.role.leaders, m.01281197
President Thomas Westwood, common.topic.notable_for, g.1q5jd3v2c
Richard Nixon, government.us_vice_president.to_president, Dwight D. Eisenhower
President of the United States, book.book_subject.works, The American Leadership Tradition: Moral Vision from Washington to Clinton
President of the United States, government.government_office_or_title.office_holders, m.03fx85y
The Reader's Companion to the American Presidency, book.written_work.editor, Davis Dyer
Ulysses S. Grant, fictional_universe.fictional_character.occupation, President of the United States
President, common.topic.webpage, m.09wwq41
President of the United States, common.topic.webpage, m.09xlnpm
President, organization.role.leaders, m.011x1m4k
m.09xgz2n, common.webpage.topic, President of the United States
President of the United States, common.topic.notable_types, Government Office or Title
m.011vg5nd, organization.leadership.role, President
The Reader's Companion to the American Presidency, common.topic.notable_types, Book
m.01142cy8, organization.leadership.role, President
President, fictional_universe.fictional_job_title.fictional_characters_with_this_job, m.0kfsbfd
m.09w6h41, common.webpage.topic, President of the United States
President Thomas Westwood, fictional_universe.fictional_character.married_to, m.010plmxm
President of the United States, government.government_office_or_title.office_holders, m.03fx83v
Abraham Lincoln, fictional_universe.fictional_character.occupation, President of the United States
William Henry Harrison, people.person.profession, Soldier
President Thomas Westwood, fictional_universe.fictional_character.gender, Male
James Taggart, fictional_universe.fictional_character.occupation, President
Presidential Command: Power, Leadership, and the Making of Foreign Policy from Richard Nixon to George W. Bush, common.topic.notable_for, g.125f9cm5z
President, fictional_universe.character_occupation.characters_with_this_occupation, Dan Conway
President of the United States, government.government_office_or_title.office_holders, m.0446bcc
George Washington, first President of the United States, common.image.appears_in_topic_gallery, President of the United States
I'm the only president you've got., media_common.quotation.author, Lyndon B. Johnson
President of the United States, common.topic.webpage, m.0663zsk
m.011fffbz, organization.leadership.role, President
Franklin D. Roosevelt, people.person.profession, Soldier
President of the United States, government.government_office_or_title.office_holders, m.0446b9j
President of the United States, base.firsts.achievement.firsts, m.04xdfjz
US President, freebase.type_hints.included_types, Politician
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Jack Ryan
President of the United States, government.government_office_or_title.office_holders, m.04466zr
President, organization.role.leaders, m.010vyf9y
George Washington, first President of the United States, common.image.appears_in_topic_gallery, Charles Lee
Benjamin Harrison, people.person.gender, Male
John Adams, government.us_president.vice_president, Thomas Jefferson
President of the United States, common.topic.webpage, m.09ysj6g
President, organization.role.leaders, m.011v50n9
Thomas Jefferson, common.topic.notable_types, US President
Franklin D. Roosevelt, people.person.profession, Politician
George H. W. Bush, common.topic.notable_types, US President
President, organization.role.leaders, m.012hw29r
President of the United States, common.topic.webpage, m.09w6pyk
President Thomas Westwood, tv.tv_character.appeared_in_tv_program, m.010pllhn
President, organization.role.leaders, m.011vg5nd
President, organization.role.leaders, m.010x4k8d
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Lt. Cmdr. Robby Jackson
President of the United States, book.book_subject.works, Presidential Command: Power, Leadership, and the Making of Foreign Policy from Richard Nixon to George W. Bush
m.03fx87q, government.government_position_held.office_holder, William Henry Harrison
President of the United States, common.topic.image, George Washington, first President of the United States
Andrew Johnson, common.topic.notable_types, US President
President, fictional_universe.character_rank.characters_of_this_rank, President of the United Federation
William Henry Harrison, people.deceased_person.place_of_death, Washington, D.C.
Thomas Jefferson, government.us_vice_president.to_president, John Adams
President, organization.role.leaders, m.011rgzqn
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Cast of Dasavathaaram
President of the United States, freebase.equivalent_topic.equivalent_type, US President
President, organization.role.leaders, m.011451lj
George Washington, common.topic.notable_types, US President
The Reader's Companion to the American Presidency, book.book.genre, Non-fiction
President Pennybaker, book.book.editions, President Pennybaker
William Henry Harrison, people.person.gender, Male
m.03fx7_v, government.government_position_held.office_holder, Benjamin Harrison
Abraham Lincoln, common.topic.notable_types, US President
m.011c2n9v, organization.leadership.role, President
President of the United States, common.topic.webpage, m.09xgz2n
President, organization.role.leaders, m.011cn57h
US President, common.topic.notable_types, John Tyler
The Reader's Companion to the American Presidency, book.written_work.subjects, President of the United States
President of the United States, book.book_subject.works, Max for President
m.011v50n9, organization.leadership.role, President
President, organization.role.governors, m.012zl7xj
Franklin D. Roosevelt, common.topic.notable_types, US President
US President, freebase.type_hints.included_types, Topic
President, organization.role.leaders, m.0n55kn3
President of the United States, government.government_office_or_title.office_holders, m.03fx88m
Zachary Taylor, government.us_president.vice_president, Millard Fillmore
m.0hnjbwk, common.webpage.topic, President of the United States
President of the United States, common.topic.webpage, m.0hnjbwk
President of the United States, base.ontologies.ontology_instance.equivalent_instances, m.07nflbk
George Washington, common.topic.image, George Washington, first President of the United States
m.0c1svhh, people.appointment.appointed_role, President of the United States
Dwight D. Eisenhower, common.topic.notable_types, US President
George Washington, first President of the United States, common.image.appears_in_topic_gallery, George Washington
William Henry Harrison, government.us_president.vice_president, John Tyler
President of the United States, government.government_office_or_title.office_holders, m.03fx838
President, common.topic.webpage, m.09ybsf2
President of the United States, government.government_office_or_title.office_holders, m.04469y1
President, organization.role.leaders, m.011fffbz
US President, type.type.domain, Government
President of the United States, government.government_office_or_title.office_holders, m.0446b70
President, organization.role.governors, m.012m3wj6
President of the United States, common.topic.webpage, m.09y9g34
m.09w6pyk, common.webpage.topic, President of the United States
m.01281197, organization.leadership.role, President
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Ulysses S. Grant
m.0b464_j, common.webpage.topic, President of the United States
Abraham Lincoln, government.us_president.vice_president, Andrew Johnson
Lyndon B. Johnson, government.us_vice_president.to_president, John F. Kennedy
President of the United States, book.book_subject.works, Madam President
President of the United States, government.government_office_or_title.jurisdiction, United States of America
President of the United States, government.government_office_or_title.office_holders, m.03fx83k
Richard Nixon, common.topic.notable_types, US President
The Reader's Companion to the American Presidency, common.topic.notable_for, g.125bp0g1z
President, organization.role.leaders, m.011c2n9v
Jimmy Carter, common.topic.notable_types, US President
President of the United States, government.government_office_or_title.office_holders, m.03fx7hy
Presidential Command: Power, Leadership, and the Making of Foreign Policy from Richard Nixon to George W. Bush, book.written_work.subjects, President of the United States
President, organization.role.leaders, m.0105whjl
President, organization.role.leaders, m.0114pzps
m.012sr44f, organization.leadership.role, President
President, common.topic.webpage, m.09xm5ms
President, organization.role.leaders, m.011p3r_p
m.09y71d4, common.webpage.topic, President
President, organization.role.leaders, m.0115g4sz
William McKinley, government.politician.government_positions_held, m.03fx85y
Andrew Johnson, government.us_vice_president.to_president, Abraham Lincoln
President, organization.role.leaders, m.012vl0sx
US President, freebase.type_hints.included_types, Person
President of the United States, government.government_office_or_title.office_holders, m.0446b9r
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Conrad Dalton
m.09w3vlb, common.webpage.topic, President
Benjamin Harrison, government.politician.government_positions_held, m.03fx7_v
Theodore Roosevelt, government.us_vice_president.to_president, William McKinley
President of the United States, book.book_subject.works, The Reader's Companion to the American Presidency
George Washington, first President of the United States, common.image.appears_in_topic_gallery, The Imperial Presidency
Theodore Roosevelt, common.topic.notable_types, US President
President, organization.role.leaders, m.012dv8px
John Adams, common.topic.notable_types, US President
Madam President, book.written_work.subjects, President of the United States
James Madison, freebase.valuenotation.is_reviewed, Vice president
m.04lsvx0, common.webpage.topic, President of the United States
Millard Fillmore, government.us_vice_president.to_president, Zachary Taylor
President of the United States, government.government_office_or_title.office_holders, m.03fx8cf
James Buchanan, common.topic.notable_types, US President
President, organization.role.leaders, m.011clphx
President of the United States, government.government_office_or_title.office_holders, m.03fx7_v
President, common.topic.article, m.060cg
President of the United States, business.employer.employees, m.0czp5hh
m.011xd0mq, organization.leadership.role, President
President of the United States, government.government_office_or_title.office_holders, m.03fx81_
Chester A. Arthur, common.topic.notable_types, US President
William Howard Taft, people.person.gender, Male
William Howard Taft, government.politician.government_positions_held, m.03fx83k
President, organization.role.leaders, m.011kx64_
Harry S. Truman, government.us_vice_president.to_president, Franklin D. Roosevelt
President of the United States, book.book_subject.works, The Sound of Leadership: Presidential Communication in the Modern Age
m.09y93hy, common.webpage.topic, President of the United States
US President, type.type.expected_by, President
President of the United States, common.topic.webpage, m.05ckhcc
President of the United States, book.book_subject.works, Poem for a President: Midnight Flight of the Poetry Angels
m.012hw29r, organization.leadership.role, President
Vice president, owl#inverseOf, President
m.0n55kn3, organization.leadership.role, President
m.011451lj, organization.leadership.role, President
President of the United States, common.topic.webpage, m.09ynr7x
President, organization.role.leaders, m.010qvq5k
m.0105whjl, organization.leadership.role, President
Gerald Ford, common.topic.notable_types, US President
President of the United States, government.government_position_held.office_position_or_title, m.04469xv
President, common.topic.webpage, m.09ylvg9
President, organization.role.leaders, m.012nxsv7
President of the United States, government.government_office_or_title.office_holders, m.04469xf
The Reader's Companion to the American Presidency, book.written_work.editor, Alan Brinkley
William Henry Harrison, people.person.profession, Politician
President of the United States, government.government_office_or_title.office_holders, m.03fx88b
President, common.topic.notable_for, g.1256c_knk
m.04469xv, government.politician.government_positions_held, John Tyler
President of the United States, fictional_universe.character_occupation.characters_with_this_occupation, Abraham Lincoln
m.011kx64_, organization.leadership.role, President
m.011rgzqn, organization.leadership.role, President
President Pennybaker, book.book.genre, Children's literature
President of the United States, common.topic.webpage, m.0b46f7h
Benjamin Harrison, common.topic.notable_types, US President
m.0r8vsll, organization.leadership.role, President
President, organization.role.governors, m.0130dx4d
President of the United States, book.book_subject.works, Burn Before Reading: Presidents, CIA Directors, and Secret Intelligence
Rutherford B. Hayes, common.topic.notable_types, US President
Woodrow Wilson, common.topic.notable_types, US President
President of the United States, common.topic.webpage, m.09wvy_x
Ulysses S. Grant, common.topic.notable_types, US President
m.09ylvg9, common.webpage.topic, President
President, organization.role.leaders, m.0116yb__
m.011sh1kx, organization.leadership.role, President
President Thomas Westwood, fictional_universe.fictional_character.occupation, President of the United States
President of the United States, common.topic.webpage, m.09w6h41
President, common.topic.webpage, m.09y71d4
United States of America, people.person.nationality, John Tyler
Andrew Jackson, common.topic.notable_types, US President
President, organization.role.leaders, m.011qyy9l
US President, type.type.expected_by, Owner
President of the United States, government.government_office_or_title.office_holders, m.0446b8l
President, organization.role.leaders, m.010r11r2
President of the United States, government.government_office_or_title.office_holders, m.03fx82m
President, common.topic.subject_of, Mike Ward
Harry S. Truman, people.person.quotations, Being a President is like riding a tiger. A man has to keep on riding or he is swallowed.
Franklin D. Roosevelt, government.us_president.vice_president, Harry S. Truman
President, fictional_universe.character_occupation.characters_with_this_occupation, James Taggart
m.09ynz5g, common.webpage.topic, President
President of the United States, government.government_office_or_title.office_holders, m.01xrx8q
President of the United States, common.topic.webpage, m.04lsvx0
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m.09ysj6g, common.webpage.topic, President of the United States
The Reader's Companion to the American Presidency, book.book.editions, The Reader's Companion to the American Presidency
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Answer: John Tyler