year host gold silver bronze
year
host
gold
silver
bronze
number
first second
number text(text) text text text
1976 paraguay (asuncion) brazil paraguay argentina
how many times is the host country the same country that won silver ?
WRB JJ NNS VBD-AUX DT NN NN DT JJ NN WDT VBD NN .
5
Keyword Keyword Keyword Keyword Keyword Keyword Keyword Keyword Column Keyword Column
select count ( * ) from w where c2_first = c4
Keyword Keyword Keyword None None Column None Keyword Keyword None None None Column None
['agg', 'agg_count'] ['agg', 'agg_count'] ['agg', 'agg_count'] c2_first ['', ''] ['', ''] c4