record athlete nation venue date #
record
athlete
nation
venue
date
#
first second first_number second_number
address
number parsed year month day
number
unitnum(unitnum) text text address date number
4.05 m (13 ft 31⁄4 in) sun caiyun china nanjing, china 21 may 1992 1
which country is the only one to have only one record holder for pole vaulting ?
WDT NN VBD-AUX DT RB CD TO VBD-AUX RB CD NN NN IN NNP VBG .
Germany
select c3 from w group by c3 having count ( * ) = 1