launch date operator name sample origin samples returned recovery date mission result
launch date
operator
name
sample origin
samples returned
recovery date
mission result
first second first_minimum_number first_minimum_parsed first_minimum_day first_minimum_month first_minimum_year first_maximum_number first_maximum_parsed first_maximum_day first_maximum_month first_maximum_year
first second first_number first_parsed first_year first_month first_day
timespan(text) text text text text date(text) text
june 14, 1969 (private) luna e-8-5 no.402 the moon none - failure
launch failure
what was the average amount of missions that were successful ?
WP VBD-AUX DT JJ NN IN NNS WDT VBD-AUX JJ .
4
select count ( c3 ) from w where c7 = 'success'