# name birth and death office started office ended
#
name
birth and death
office started
office ended
number
first second
minimum_number minimum_parsed minimum_day minimum_month minimum_year maximum_number maximum_parsed maximum_day maximum_month maximum_year
number parsed year month day
number parsed year
number text(text) timespan date date
1 petur sigurgeirsson
(son of sigurgeir sigurðsson, 8th bishop of iceland) 27 october 1761
-
20 september 1823 24 june 2012 1823
for how many years did hallgrimur sveinsson serve as the bishop of iceland ?
IN WRB JJ NNS VBD-AUX NNP NNP VB IN DT NNP IN NNP .
19
select c5_number - c4_number from w where c2_first = 'hallgrimur sveinsson'