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 Maryland Senator held their governmental position the earliest? 
Knowledge Triplets: m.05nlpmx, government.government_position_held.office_position_or_title, President pro tempore of the United States Senate
m.0bfnywn, government.government_position_held.office_holder, Benjamin Ogle
m.0ncsxpc, government.government_position_held.governmental_body, United States Senate
m.010d2znn, government.government_position_held.office_position_or_title, United States Senator
Lieutenant Governor of Maryland, common.topic.notable_types, Government Office or Title
m.0n9d39b, government.government_position_held.basic_title, Senator
m.0ncslmv, government.government_position_held.governmental_body, United States Senate
Maryland Senate, government.governmental_body.jurisdiction, Maryland
m.05kgxx2, government.government_position_held.governmental_body, United States Senate
m.0bfnyx7, government.government_position_held.jurisdiction_of_office, Maryland
m.05kd8y3, government.government_position_held.office_holder, Barbara Mikulski
m.0n653h1, government.government_position_held.governmental_body, United States Senate
m.011f86zn, government.government_position_held.basic_title, State Senator
m.0m3hcfb, government.government_position_held.office_holder, William Hindman
Maryland, government.political_district.representatives, m.05kd8y3
m.0_zbq82, government.government_position_held.jurisdiction_of_office, Maryland
Maryland, government.governmental_jurisdiction.government_bodies, Maryland House of Delegates
m.0bfnyvg, government.government_position_held.jurisdiction_of_office, Maryland
m.011f86qt, government.government_position_held.jurisdiction_of_office, Maryland
m.052jk2b, government.government_position_held.office_position_or_title, United States Senate minority leader
m.0bfnynb, government.government_position_held.jurisdiction_of_office, Maryland
m.09pv6sl, government.government_position_held.district_represented, Maryland
m.0n99qlc, government.government_position_held.district_represented, Maryland
m.0hz6_2b, government.government_position_held.office_position_or_title, Secretary of State of Maryland
m.09sf0lq, government.government_position_held.district_represented, Maryland
m.010d2911, government.government_position_held.basic_title, Senator
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnywc
Maryland House of Delegates, common.topic.notable_types, Governmental Body
m.09s62p9, government.government_position_held.office_holder, John Thomson Mason
Maryland House of Delegates, government.governmental_body.jurisdiction, Maryland
m.09rfdwh, government.government_position_held.office_position_or_title, President pro tempore of the United States Senate
m.09qpqyh, government.government_position_held.basic_title, Senator
m.05kgxx2, government.government_position_held.office_position_or_title, United States Senator
m.05kd8y3, government.government_position_held.office_position_or_title, United States Senator
m.0m3hcfb, government.government_position_held.basic_title, Senator
m.0n5kncx, government.government_position_held.basic_title, Senator
m.0nbxxfz, government.government_position_held.district_represented, Maryland
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnyvg
m.0nbx2gp, government.government_position_held.office_holder, William Duhurst Merrick
m.04mmcc8, government.government_position_held.office_position_or_title, President pro tempore of the United States Senate
m.09ryjss, government.government_position_held.office_holder, Matthew Tilghman
m.0n9d39b, government.government_position_held.office_position_or_title, United States Senator
m.05c6vfj, government.government_position_held.office_position_or_title, Attorney General of Maryland
Governor of Maryland, government.government_office_or_title.office_holders, m.09rqv57
m.0hz6_2b, government.government_position_held.office_holder, John P. McDonough
m.04mmcc8, government.government_position_held.governmental_body, United States Senate
m.0k1bgw_, government.government_position_held.office_position_or_title, United States Senate majority leader
m.0bfnytq, government.government_position_held.office_holder, George Plater
m.09rqv57, government.government_position_held.office_position_or_title, Governor of Maryland
m.0bfnyvr, government.government_position_held.office_holder, William Smallwood
m.05c6vgm, government.government_position_held.office_holder, William Pinkney
m.09qpqyh, government.government_position_held.district_represented, Maryland
m.0nby_lw, government.government_position_held.district_represented, Maryland
m.09pv6sl, government.government_position_held.office_holder, Charles Carroll of Carrollton
m.0n9d39b, government.government_position_held.governmental_body, United States Senate
m.0m3hsmf, government.government_position_held.district_represented, Maryland
m.09rfdwh, government.government_position_held.governmental_body, United States Senate
Maryland, government.governmental_jurisdiction.government_positions, Governor of Maryland
m.0m4pf_2, government.government_position_held.district_represented, Maryland
m.0m3hcfb, government.government_position_held.governmental_body, United States Senate
m.0bfnyw1, government.government_position_held.jurisdiction_of_office, Maryland
m.0m4hl7l, government.government_position_held.district_represented, Maryland
Governor of Maryland, government.government_office_or_title.category, Governor
m.0m3p89g, government.government_position_held.governmental_body, United States Senate
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnyw1
m.09pvgcj, government.government_position_held.office_holder, John Henry
m.010f0_1_, government.government_position_held.jurisdiction_of_office, Maryland
m.09pvgcj, government.government_position_held.office_position_or_title, United States Senator
Lieutenant Governor of Maryland, government.government_office_or_title.office_holders, m.010f0_1_
m.0nbxxfz, government.government_position_held.office_position_or_title, United States Senator
m.0n5kmxd, government.government_position_held.district_represented, Maryland
m.052jk8v, government.government_position_held.office_position_or_title, United States Senate majority leader
Governor of Maryland, common.topic.notable_types, Government Office or Title
m.0m4hl7l, government.government_position_held.office_position_or_title, United States Senator
m.0n66v6d, government.government_position_held.district_represented, Maryland
m.010d2911, government.government_position_held.governmental_body, United States Senate
m.0bfnywz, government.government_position_held.jurisdiction_of_office, Maryland
m.010d2znn, government.government_position_held.district_represented, Maryland
m.0n9d39b, government.government_position_held.district_represented, Maryland
Maryland, location.administrative_division.country, United States of America
Secretary of State of Maryland, government.government_office_or_title.category, Secretary of state
m.05kgxx2, government.government_position_held.office_holder, Ben Cardin
Attorney General of Maryland, government.government_office_or_title.office_holders, m.0hzbspx
m.0n7z7vx, government.government_position_held.basic_title, Senator
m.0nby_lw, government.government_position_held.office_position_or_title, United States Senator
m.05c6vg_, government.government_position_held.office_position_or_title, Attorney General of Maryland
Maryland Senate, government.governmental_body.body_this_is_a_component_of, Maryland General Assembly
Maryland, government.governmental_jurisdiction.government_bodies, Maryland Senate
m.05c6vgd, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.09s62p9, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.0nby_lw, government.government_position_held.basic_title, Senator
m.0bfnytd, government.government_position_held.office_holder, John Hoskins Stone
m.0n99qlc, government.government_position_held.basic_title, Senator
m.05c6vgm, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.0n4qz21, government.government_position_held.office_position_or_title, United States Senator
m.0_zbq82, government.government_position_held.district_represented, Maryland
m.04d4qrz, government.government_position_held.office_position_or_title, Governor of Maryland
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vfz
Lieutenant Governor of Maryland, government.government_office_or_title.office_holders, m.010f0_dn
m.0bfnytq, government.government_position_held.office_position_or_title, Governor of Maryland
m.05kgxx2, government.government_position_held.district_represented, Maryland
m.0bfnyx7, government.government_position_held.office_position_or_title, Governor of Maryland
m.011f86yx, government.government_position_held.governmental_body, Maryland Senate
m.0n653h1, government.government_position_held.district_represented, Maryland
m.0bfnywz, government.government_position_held.office_position_or_title, Governor of Maryland
m.05c6vgd, government.government_position_held.office_holder, J. Joseph Curran, Jr.
m.0nbx2gp, government.government_position_held.basic_title, Senator
m.0m4pf_2, government.government_position_held.office_position_or_title, United States Senator
m.0n5kmxd, government.government_position_held.office_position_or_title, United States Senator
m.09ryjss, government.government_position_held.legislative_sessions, First Continental Congress
m.0hzbspx, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.0bfnyvg, government.government_position_held.office_holder, John Francis Mercer
m.0nbz0_p, government.government_position_held.governmental_body, United States Senate
m.09pvgcj, government.government_position_held.basic_title, Senator
m.0m3hcfb, government.government_position_held.office_position_or_title, United States Senator
Maryland, government.governmental_jurisdiction.governing_officials, m.011f86yx
m.0bfnywz, government.government_position_held.office_holder, William Paca
United States Senate, government.government_position_held.governmental_body, m.05kd8y3
m.05k9hxg, government.government_position_held.office_position_or_title, United States Senate majority leader
Maryland Senate, government.governmental_body.members, g.11btv6yp3m
Secretary of State of Maryland, common.topic.notable_types, Government Office or Title
m.09sf0lq, government.government_position_held.basic_title, Senator
m.0n99ky_, government.government_position_held.office_holder, Robert Henry Goldsborough
m.052jk8c, government.government_position_held.governmental_body, United States Senate
m.09ryj2_, government.government_position_held.office_holder, Robert Goldsborough
m.0bfnyv4, government.government_position_held.jurisdiction_of_office, Maryland
m.09sf0lq, government.government_position_held.governmental_body, United States Senate
m.0nbz2xd, government.government_position_held.governmental_body, United States Senate
John Francis Mercer, government.politician.government_positions_held, m.0bfnyvg
m.052jk8c, government.government_position_held.office_position_or_title, United States Senate majority leader
m.010d2znn, government.government_position_held.office_holder, Paul Sarbanes
Government of Maryland, common.topic.article, m.045dm8
m.0nbz0_p, government.government_position_held.office_position_or_title, President pro tempore of the United States Senate
Maryland Senate, common.topic.notable_for, g.1256dwwz1
m.0n5kncx, government.government_position_held.office_holder, Robert Goodloe Harper
Attorney General of Maryland, government.government_office_or_title.office_holders, m.09s62p9
m.09sf0lq, government.government_position_held.office_holder, John Eager Howard
m.09pv6sl, government.government_position_held.governmental_body, United States Senate
m.0n7z7vx, government.government_position_held.governmental_body, United States Senate
Governor of Maryland, government.government_office_or_title.office_holders, m.04d4qrz
Maryland Senate, common.topic.webpage, m.052bkb3
m.0bfnyvr, government.government_position_held.jurisdiction_of_office, Maryland
m.010d2911, government.government_position_held.district_represented, Maryland
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnyvr
m.05c6vfz, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.05k9jtj, government.government_position_held.office_position_or_title, United States Senate minority leader
Maryland Senate, government.governmental_body.members, m.011f86zn
m.09sf0lq, government.government_position_held.office_position_or_title, United States Senator
m.0n7z7vx, government.government_position_held.office_position_or_title, United States Senator
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vfj
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnyx7
Robert Henry Goldsborough, government.politician.government_positions_held, m.0n99ky_
m.05kd8y3, government.government_position_held.district_represented, Maryland
m.05kgxx2, government.government_position_held.basic_title, Senator
m.0bfnyv4, government.government_position_held.office_position_or_title, Governor of Maryland
m.011f86yx, government.government_position_held.basic_title, State Senator
Maryland House of Delegates, government.governmental_body.members, m.011f86qt
m.010d2911, government.government_position_held.office_position_or_title, United States Senator
m.09qpqyh, government.government_position_held.office_holder, Richard Potts
m.09ryj5x, government.government_position_held.district_represented, Maryland
Maryland, government.political_district.representatives, m.0n9d39b
m.0_zbq82, government.government_position_held.office_position_or_title, President of the Maryland Senate
m.0bfnyx7, government.government_position_held.office_holder, James Brice
m.09pv6sl, government.government_position_held.office_position_or_title, United States Senator
Maryland General Assembly, government.governmental_body.component_bodies, Maryland Senate
m.0n66v6d, government.government_position_held.office_holder, William Pinkney
m.0n4qz21, government.government_position_held.governmental_body, United States Senate
m.0bfnywc, government.government_position_held.office_holder, Thomas Sim Lee
m.0n5kncx, government.government_position_held.office_position_or_title, United States Senator
m.0n7z7vx, government.government_position_held.district_represented, Maryland
Governor of Maryland, government.government_office_or_title.jurisdiction, Maryland
m.05nlpmx, government.government_position_held.governmental_body, United States Senate
m.0m4hl7l, government.government_position_held.basic_title, Senator
m.09ryj5x, government.government_position_held.office_holder, Thomas Johnson
Maryland Senate, government.governmental_body.sessions, 425th Maryland General Assembly
m.0nbx2gp, government.government_position_held.office_position_or_title, United States Senator
m.05k9hxg, government.government_position_held.governmental_body, United States Senate
m.0bfnyxk, government.government_position_held.jurisdiction_of_office, Maryland
m.0n66v6d, government.government_position_held.basic_title, Senator
m.011f86qt, government.government_position_held.governmental_body, Maryland House of Delegates
Maryland House of Delegates, government.governmental_body.sessions, 425th Maryland General Assembly
Robert Henry Goldsborough, government.politician.government_positions_held, m.0n4qz21
m.0m_h742, government.government_position_held.governmental_body, United States Senate
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vfr
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnyv4
m.0m4pf_2, government.government_position_held.governmental_body, United States Senate
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vgt
m.0m3hsmf, government.government_position_held.basic_title, Senator
m.0m_h742, government.government_position_held.district_represented, Maryland
Attorney General of Maryland, government.government_office_or_title.category, Attorney general
Attorney General of Maryland, common.topic.notable_types, Government Office or Title
m.0nbx2gp, government.government_position_held.governmental_body, United States Senate
m.09ryjgc, government.government_position_held.office_holder, William Paca
m.0bfnywc, government.government_position_held.jurisdiction_of_office, Maryland
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnytd
President of the Maryland Senate, government.government_office_or_title.office_holders, m.0_zbq82
m.052bkb3, common.webpage.topic, Maryland Senate
Attorney general, government.government_office_category.offices, Attorney General of Maryland
m.0ncslmv, government.government_position_held.office_position_or_title, United States Senator
m.09pvgcj, government.government_position_held.district_represented, Maryland
m.0nbx2gp, government.government_position_held.district_represented, Maryland
m.09rqv57, government.government_position_held.office_holder, Bob Ehrlich
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vgd
m.0m3p89g, government.government_position_held.basic_title, Senator
m.052jk8v, government.government_position_held.governmental_body, United States Senate
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnywz
Attorney General of Maryland, government.government_office_or_title.jurisdiction, Maryland
President of the Maryland Senate, common.topic.notable_types, Government Office or Title
m.0n653h1, government.government_position_held.office_holder, Edward Lloyd
m.04x_n7x, government.government_position_held.office_position_or_title, Governor of Maryland
m.0nbz1pm, government.government_position_held.office_position_or_title, United States Senator
m.09pvgcj, government.government_position_held.governmental_body, United States Senate
m.0m3p89g, government.government_position_held.office_position_or_title, United States Senator
m.0n653h1, government.government_position_held.basic_title, Senator
m.0bfnywn, government.government_position_held.office_position_or_title, Governor of Maryland
m.0ncsxpc, government.government_position_held.district_represented, Maryland
m.0ncsxpc, government.government_position_held.basic_title, Senator
m.05k9jtj, government.government_position_held.governmental_body, United States Senate
m.0nbz2xd, government.government_position_held.office_position_or_title, President pro tempore of the United States Senate
m.0n99ky_, government.government_position_held.office_position_or_title, United States Senator
Maryland Senate, government.governmental_body.members, m.011f86yx
m.0bfnyxk, government.government_position_held.office_position_or_title, Governor of Maryland
m.010f0_1_, government.government_position_held.office_holder, Anthony G. Brown
m.0130kxq9, government.government_position_held.governmental_body, Maryland Senate
m.010f0_1_, government.government_position_held.office_position_or_title, Lieutenant Governor of Maryland
m.0k1bgw_, government.government_position_held.governmental_body, United States Senate
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnywn
m.0n66v6d, government.government_position_held.governmental_body, United States Senate
Maryland Senate, common.topic.notable_types, Governmental Body
m.0m4hl7l, government.government_position_held.governmental_body, United States Senate
m.0m3hsmf, government.government_position_held.office_position_or_title, United States Senator
m.0n99ky_, government.government_position_held.governmental_body, United States Senate
m.010d2znn, government.government_position_held.basic_title, Senator
m.0bfnytd, government.government_position_held.jurisdiction_of_office, Maryland
m.04x_n7x, government.government_position_held.office_holder, Martin O'Malley
m.0bfnyw1, government.government_position_held.office_holder, John Eager Howard
m.094t_m4, government.government_position_held.office_position_or_title, United States Senate majority leader
m.04x_n7x, government.government_position_held.jurisdiction_of_office, Maryland
m.0nbz1pm, government.government_position_held.office_holder, Reverdy Johnson
m.0bfnytd, government.government_position_held.office_position_or_title, Governor of Maryland
Secretary of State of Maryland, government.government_office_or_title.jurisdiction, Maryland
m.052jk8m, government.government_position_held.office_position_or_title, United States Senate minority leader
m.0n4qz21, government.government_position_held.district_represented, Maryland
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vgm
m.010f0_dn, government.government_position_held.office_position_or_title, Lieutenant Governor of Maryland
Maryland, government.political_district.representatives, m.010d2911
m.010d2911, government.government_position_held.office_holder, Charles Mathias
m.0n5kmxd, government.government_position_held.basic_title, Senator
m.0nbz1pm, government.government_position_held.district_represented, Maryland
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnyxk
m.0m_h742, government.government_position_held.office_position_or_title, United States Senator
Attorney General of Maryland, government.government_office_or_title.office_holders, m.05c6vg_
Charles Carroll of Carrollton, government.politician.government_positions_held, m.09pv6sl
Maryland, government.governmental_jurisdiction.government_positions, Attorney General of Maryland
m.0bfnynb, government.government_position_held.office_holder, John Henry
m.0m_h742, government.government_position_held.basic_title, Senator
m.0nbxxfz, government.government_position_held.basic_title, Senator
m.0bfnyxk, government.government_position_held.office_holder, Thomas Johnson
m.0n5kmxd, government.government_position_held.governmental_body, United States Senate
m.0bfnyvr, government.government_position_held.office_position_or_title, Governor of Maryland
m.0n5kncx, government.government_position_held.governmental_body, United States Senate
Maryland Senate, government.governmental_body.members, m.0130kxq9
m.0ncslmv, government.government_position_held.basic_title, Senator
m.0n99ky_, government.government_position_held.district_represented, Maryland
m.0n99qlc, government.government_position_held.governmental_body, United States Senate
m.0m3p89g, government.government_position_held.district_represented, Maryland
m.0nby_lw, government.government_position_held.governmental_body, United States Senate
Government of Maryland, common.topic.notable_for, g.1259f0n8n
m.0hz6_2b, government.government_position_held.jurisdiction_of_office, Maryland
m.010d2znn, government.government_position_held.governmental_body, United States Senate
m.04d4qrz, government.government_position_held.jurisdiction_of_office, Maryland
m.052jk2b, government.government_position_held.governmental_body, United States Senate
m.010f0_dn, government.government_position_held.office_holder, Michael Steele
m.0n5kncx, government.government_position_held.district_represented, Maryland
m.0hzbspx, government.government_position_held.jurisdiction_of_office, Maryland
Secretary of state, government.government_office_category.offices, Secretary of State of Maryland
m.09ryjss, government.government_position_held.district_represented, Maryland
Governor of Maryland, government.government_office_or_title.office_holders, m.0bfnytq
m.0bfnywn, government.government_position_held.jurisdiction_of_office, Maryland
m.05c6vgt, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.011f86zn, government.government_position_held.governmental_body, Maryland Senate
m.0nbz1pm, government.government_position_held.governmental_body, United States Senate
m.0n99qlc, government.government_position_held.office_position_or_title, United States Senator
Governor of Maryland, government.government_office_or_title.office_holders, m.04x_n7x
m.0nbxxfz, government.government_position_held.governmental_body, United States Senate
Maryland Senate, common.topic.article, m.04fcf0
m.0n653h1, government.government_position_held.office_position_or_title, United States Senator
m.0m3hsmf, government.government_position_held.governmental_body, United States Senate
m.0bfnyvg, government.government_position_held.office_position_or_title, Governor of Maryland
m.0ncslmv, government.government_position_held.office_holder, Thomas Pratt
m.0hz6_2b, government.government_position_held.appointed_by, Martin O'Malley
m.05c6vgd, government.government_position_held.jurisdiction_of_office, Maryland
m.09ryj2_, government.government_position_held.district_represented, Maryland
m.0bfnytq, government.government_position_held.jurisdiction_of_office, Maryland
m.05kd8y3, government.government_position_held.governmental_body, United States Senate
m.09ryjgc, government.government_position_held.district_represented, Maryland
Maryland, government.governmental_jurisdiction.government_positions, Secretary of State of Maryland
m.0m4pf_2, government.government_position_held.basic_title, Senator
Maryland House of Delegates, government.governmental_body.body_this_is_a_component_of, Maryland General Assembly
m.09rqv57, government.government_position_held.jurisdiction_of_office, Maryland
m.05c6vfr, government.government_position_held.office_position_or_title, Attorney General of Maryland
m.0ncsxpc, government.government_position_held.office_position_or_title, United States Senator
m.05kd8y3, government.government_position_held.basic_title, Senator
m.011f86yx, government.government_position_held.jurisdiction_of_office, Maryland
m.09ryhvf, government.government_position_held.district_represented, Maryland
m.0bfnywc, government.government_position_held.office_position_or_title, Governor of Maryland
m.011f86zn, government.government_position_held.jurisdiction_of_office, Maryland
m.0nbz1pm, government.government_position_held.basic_title, Senator
United States of America, people.person.nationality, Barbara Mikulski
m.09s62p9, government.government_position_held.jurisdiction_of_office, Maryland
m.09qpqyh, government.government_position_held.governmental_body, United States Senate
m.0n99ky_, government.government_position_held.basic_title, Senator
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Answer: Barbara Mikulski