In the quarter century that has passed, the objective conditions for the socialist revolution have reached maturity and the decay and disintegration of capitalism have revealed themselves in the abortive attempts at revolution on the part of the masses, in 
(the quarter century; has passed; ) (the objective conditions for the socialist revolution; have reached; maturity; T:In the quarter century) (the decay and disintegration of capitalism; have revealed; themselves; L:in the abortive attempts at revolution on the part of the masses)
the quarter century the objective conditions for the socialist revolution the decay and disintegration of capitalism
has passed have reached have revealed
maturity T:In the quarter century
themselves L:in the abortive attempts at revolution on the part of the masses