rank name height floors year notes
rank
name
height
floors
year
notes
number
first second first_number second_number
number
number
number text unitnum(unitnum) number number text
1 zions bank building
zions bank building in downtown boise, idaho 323 ft (98 m) 20 2013 tallest building in state since 2013
what is the number of floors of the oldest building ?
WP VBD-AUX DT NN IN NNS IN DT JJS NN .
4
select c4 from w order by c5_number asc limit 1