# menteri besar took office left office party
#
menteri besar
took office
left office
party
number
number parsed year month day
number parsed year month day
number text date date text
1 jaafar mohamed september 16, 1928 november 23, 1931 no party
how many years was jaafar mohamed in office ?
WRB JJ NNS VBD-AUX NNP NNP IN NNP .
4
select c4_year - c3_year from w where c2 = 'jaafar mohamed'