year conservative
councillors labour
councillors independent
councillors liberal
councillors
year
conservative councillors
labor councillors
independent councillors
liberal councillors
number
number
number
number
number
number number number number number
1947 3 2 18 1
in how many years were there no liberal councillors ?
IN WRB JJ NNS VBD-AUX EX DT JJ NNS .
8
select count ( c1 ) from w where c5_number = 0