Question: When did the last navajo code talker die?

Disambiguated questions and answers:
context: To ensure a consistent use of code terminologies throughout the Pacific theater, representative code talkers of each of the US Marine divisions met in Hawaii to discuss shortcomings in the code, incorporate new terms into the system, and update their codebooks. These representatives, in turn, trained other code talkers who could not attend the meeting. As the war progressed, additional code words were added and incorporated program-wide. In other instances, informal shortcut code words were devised for a particular campaign and not disseminated beyond the area of operation. Examples of code words include the Navajo word for "buzzard", , which was used for "bomber", while the code word used for "submarine", , meant "iron fish" in Navajo. The last of the original 29 Navajo code talkers who developed the code, Chester Nez, died on June 4, 2014.
question: When did the last of the original 29 Navajo code talkers who developed the code die?
short_answers: June 4, 2014
wikipage: Code talker
context: Four of the last nine Navajo code talkers used in the military died in 2019: Alfred K. Newman, died on January 13, 2019, at the age of 94. On May 10, 2019, Fleming Begaye Sr., died at the age of 97. New Mexico State Senator John Pinto, elected in 1977, died in office on May 24, 2019. William Tully Brown died in June 2019 aged 96.
question: When did one of the last Navajo code talkers, Alfred K Newman die?
short_answers: January 13, 2019
wikipage: Code talker
context: Four of the last nine Navajo code talkers used in the military died in 2019: Alfred K. Newman, died on January 13, 2019, at the age of 94. On May 10, 2019, Fleming Begaye Sr., died at the age of 97. New Mexico State Senator John Pinto, elected in 1977, died in office on May 24, 2019. William Tully Brown died in June 2019 aged 96.
question: When did one of the last Navajo code talkers, Fleming Begaye Sr., die?
short_answers: May 10, 2019
wikipage: Code talker
context: Four of the last nine Navajo code talkers used in the military died in 2019: Alfred K. Newman, died on January 13, 2019, at the age of 94. On May 10, 2019, Fleming Begaye Sr., died at the age of 97. New Mexico State Senator John Pinto, elected in 1977, died in office on May 24, 2019. William Tully Brown died in June 2019 aged 96.
question: When did one of the last Navajo code talkers, John Pinto, die?
short_answers: May 24, 2019
wikipage: Code talker
context: Four of the last nine Navajo code talkers used in the military died in 2019: Alfred K. Newman, died on January 13, 2019, at the age of 94. On May 10, 2019, Fleming Begaye Sr., died at the age of 97. New Mexico State Senator John Pinto, elected in 1977, died in office on May 24, 2019. William Tully Brown died in June 2019 aged 96.
question: When did one of the last Navajo code talkers, William Tully Brown, die?
short_answers: June 2019
wikipage: Code talker
context: No context provided
question: When did one of the last Navajo code talkers, Joe Vandever Sr., die?
short_answers: January 31, 2020

Long-form answers:
knowledge: content: A code talker was a person employed by the military during wartime to use a little-known language as a means of secret communication. The term is now usually associated with United States service members during the world wars who used their knowledge of Native American languages as a basis to transmit coded messages.
wikipage: Code talker
long_answer: A code talker was a person employed by the military during wartime to use a little-known language as a means of secret communication. They are usually associated with United States service members during the world wars who used their knowledge of Native American languages to transmit coded messages. The last of the original 29 Navajo code talkers, Chester Nez, died on June 4, 2014. Other code talkers that recently passed away, all among the last used by the US military, include Alfred K. Newman on January 13, 2019, Fleming Begaye Sr. on May 10, 2019, John Pinto on May 24, 2019, William Tully Brown in June 2019 and Joe Vandever Sr. on January 31, 2020.