poll company source publication date psuv opposition undecided
poll company
source
publication date
psuv
opposition
undecided
number parsed year month day
number
number
number
text text date number number number
gis xxi radio nacional de venezuela 2 september 2010 32 22 36
which source was used before may 2010 ?
WDT NN VBD-AUX VBN IN VBD-AUX CD .
Radio Nacional de Venezuela
Keyword Column Keyword Keyword Keyword Column Keyword Keyword Keyword Column Keyword Keyword Keyword Column Keyword Literal.String Keyword
select c2 from w where c3_parsed < ( select c3_parsed from w where c3 = 'may 2010' )
None Column None None Column Literal Literal None
c2 c3_parsed