What key details about jon hol can be extracted from the following bio? Bio: jon gundersen hol -lrb- 1 september 1851 -- 1941 -rrb- was a norwegian engineer and activist . he is known for his pamphlet '' rifleringen '' , published in february 1884 , that resulted in his arrest for lese majeste . in the pamphlet , he called for soldiers and civilians to arm themselves and encircle the parliament of norway building , creating a '' ring of rifles '' , should the need arise . the political situation in norway at the time was unstable , with an ongoing impeachment case against the conservative government started by political liberals . king oscar ii of sweden and norway supported the conservative politicians , and hol believed that a political and military counter-offensive was planned , hence the need for guarding the parliament . the tensions between liberals and conservatives drew hol into politics in the first place in 1880 . before this , he was an engineer by occupation and a writer , albeit apolitical . he increased his writing after 1880 , and also involved himself in non-socialist trade unions , including the unsuccessful attempt of establishing a national trade union center in kristiania . when the conservatives lost the impeachment case , there was a change of government and the charges against hol were dropped . two years later , he received an economic compensation from the parliament . after some quiet years in which he concentrated on engineering work , hol returned to politics as a member of the city council of skien , representing the local temperance movement . he stood for parliamentary election twice , without success .
A:
- known for is engineering work activism- caption is illustration from '' verdens gang '' , 1884 .- death date is 1941 , before 16 may -lrb- aged 89 -rrb-- birth date is 1 september 1851- name is jon hol- image is jon_hol . png- birth place is nord-odal , norway- occupation is engineer