# name alma mater birth date marriage date president tenure tenure
#
name
alma mater
birth date
marriage date
president
tenure
tenure
number
number parsed year month day
number parsed year month day
number parsed year month day
number parsed year month day
number text text date date text date date
1 jiang qing shandong provincial experimental theatre 19 march 1914 20 november 1938 mao zedong 27 september 1954 27 april 1959
which name is the only one with no birth date
WDT NN VBD-AUX DT RB CD IN DT NN NN
He Lianying
Keyword Column Keyword Keyword Keyword Column Keyword Keyword
select c2 from w where c4 is null
None Column None None None None Keyword Keyword Column Column
c2 ['null', 'null_null'] ['null', 'null_null'] c4 c4