location name of mill and
grid reference type maps first mention
or built last mention
or demise
location
name of mill and grid reference
type
maps
first mention or built
last mention or demise
list length list_number
number parsed year
number
text text text <n,number> date number
chesfield chesfield park post 1822 1318 1372
how many locations have or had at least 2 windmills ?
WRB JJ NNS VBD-AUX CC VBD-AUX IN JJS CD NNS .
4
select count ( * ) from ( select c1 from w group by c1 having count ( * ) >= 2 )