finished horse jockey trainer owner time / behind
finished
horse
jockey
trainer
owner
time \\/ behind
number
rank text text text text text
1st spokane tom kiley john rodegap noah armstrong 2:34.50
what is the total number of trainers listed ?
WP VBD-AUX DT JJ NN IN NNS VBN .
1
Keyword Keyword Keyword Column Keyword Keyword Keyword
select count ( c4 ) from w
None None None Keyword Keyword Keyword Column None None
['agg', 'agg_count'] ['agg', 'agg_count'] ['agg', 'agg_count'] c4