ship name in service project number type class comments
ship name
in service
project number
type
class
comments
number
text number text text text text
lenin 1959 92m icebreaker arktika decommissioned 1989. museum ship
how many years later was the sibir in service after the lenin ?
WRB JJ NNS RB VBD-AUX DT NNP IN NNP IN DT NNP .
18
select ( select c2 from w where c1 = 'sibir' ) - ( select c2 from w where c1 = 'lenin' )