year competition venue position event notes
year
competition
venue
position
event
notes
number
address
number
number hour min sec
number text address rank text time
1994 european championships helsinki, finland 48th marathon 2:22:49
what is the total amount of times the frankfurt marathon occurred ?
WP VBD-AUX DT JJ NN IN NNS DT NNP NNP VBD .
2
select count ( * ) from w where c2 = 'frankfurt marathon'