Available for SRL tasks are efforts such as PropBank ( Palmer et al , 2005 ) and FrameNet ( Fillmore et al , 2003 ) that have developed semantic role labels ( based on differing approaches ) and have labeled large corpora for training and testing of SRL systems . PropBank ( PB ) identifies and labels the semantic arguments of the verb on a verb-by-verb basis , creating a separate frameset that includes verb specific semantic roles to account for each subcategorization frame of the verb . Much like PB , FrameNet ( FN ) identifies and labels semantic roles , known as Frame Elements , around a relational target , usually a verb.2 But unlike PB , Frame Elements less verb specific , but rather are defined in terms of semantic structures called frames evoked by the verb . That is , one or more verbs can be associated with a single semantic frame .