With the recent extension of PropBank SRL to nominal and adjective predicates, preposition relationships, light-verb constructions, and abstract meaning representation (Bonial et al., 2014;Banarescu et al., 2013), it may be time to revisit SP for SRL.
with this definition, we allow different role labels to share the same topic (though it does not encode role constraints quite like LinkLDA, ROOTH-LDA, etc).