Question: who are the leaders of the jehovah witnesses
[{'answer': 'Mark Stephen Lett', 'provenance': [{'wikipedia_id': '3613447', 'title': "Governing Body of Jehovah's Witnesses", 'start_paragraph_id': 41, 'start_character': 12, 'end_paragraph_id': 41, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Governing Body members.:Current.\n'}]}, {'answer': 'Gerrit Lösch', 'provenance': [{'wikipedia_id': '3613447', 'title': "Governing Body of Jehovah's Witnesses", 'start_paragraph_id': 42, 'start_character': 12, 'end_paragraph_id': 42, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Governing Body members.:Current.\n'}]}, {'answer': 'Anthony Morris III', 'provenance': [{'wikipedia_id': '3613447', 'title': "Governing Body of Jehovah's Witnesses", 'start_paragraph_id': 43, 'start_character': 12, 'end_paragraph_id': 43, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Governing Body members.:Current.\n'}]}, {'answer': 'Mark Sanderson', 'provenance': [{'wikipedia_id': '3613447', 'title': "Governing Body of Jehovah's Witnesses", 'start_paragraph_id': 44, 'start_character': 15, 'end_paragraph_id': 44, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Governing Body members.:Current.\n'}]}, {'answer': 'David H. Splane'}, {'answer': "The Governing Body of Jehovah 's Witnesses"}, {'answer': 'Geoffrey Jackson'}, {'answer': "Governing Body of Jehovah 's Witnesses"}, {'answer': 'Kenneth Cook'}, {'answer': 'Samuel F. Herd'}, {'provenance': [{'wikipedia_id': '3613447', 'title': "Governing Body of Jehovah's Witnesses", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 412, 'bleu_score': 0.8716549404888441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2937517566169213434}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '52547', 'title': "Jehovah's Witnesses", 'section': 'Section::::History.:Background (1870–1916).\n', 'start_paragraph_id': 8, 'end_paragraph_id': 8, 'meta': {'evidence_span': ['The book taught that God\'s dealings with humanity were divided dispensationally, each ending with a "harvest," that Christ had returned as an invisible spirit being in 1874 inaugurating the "harvest of the Gospel age," and that 1914 would mark the end of a 2520-year period called "the Gentile Times," at which time world society would be replaced by the full establishment of God\'s kingdom on earth.', 'In 1870, Charles Taze Russell and others formed a group in Pittsburgh, Pennsylvania to study the Bible. During the course of his ministry, Russell disputed many beliefs of mainstream Christianity including immortality of the soul, hellfire, predestination, the fleshly return of Jesus Christ, the Trinity, and the burning up of the world. In 1876, Russell met Nelson H. Barbour; later that year they jointly produced the book "Three Worlds," which combined restitutionist views with end time prophecy. The book taught that God\'s dealings with humanity were divided dispensationally, each ending with a "harvest," that Christ had returned as an invisible spirit being in 1874 inaugurating the "harvest of the Gospel age," and that 1914 would mark the end of a 2520-year period called "the Gentile Times," at which time world society would be replaced by the full establishment of God\'s kingdom on earth. Beginning in 1878 Russell and Barbour jointly edited a religious journal, "Herald of the Morning". In June 1879 the two split over doctrinal differences, and in July, Russell began publishing the magazine "Zion\'s Watch Tower and Herald of Christ\'s Presence", stating that its purpose was to demonstrate that the world was in "the last days," and that a new age of earthly and human restitution under the reign of Christ was imminent.']}}]}, {'provenance': [{'wikipedia_id': '387981', 'title': 'President of the Church', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Several other titles have been associated with this office, including First Elder of the church, Presiding High Priest, President of the High Priesthood, Trustee-in-Trust for the church, Prophet, Seer, Revelator, and Translator. Joseph Smith was known by all of these titles in his lifetime (although not necessarily with consistency).', "In the Latter Day Saint movement, the President of the Church is generally considered to be the highest office of the church. It was the office held by Joseph Smith, founder of the movement, and the office assumed by many of Smith's claimed successors, such as Brigham Young, Joseph Smith III, Sidney Rigdon, and James Strang. Several other titles have been associated with this office, including First Elder of the church, P"]}}]}]