If h k i is the encoding of the k-th layer for , and y i = h m i where m = 6 is the final BiLSTM layer, while LSTM f and LSTM b are the forward and backward LSTM transformations.
in order to understand the meaning of sentences, the semantics of verbs plays a crucial role, since verbs define the argument structure roughly in terms of "who" did "what" to "whom", with the arguments being the constituents that bear a semantic relation (called semantic role) with the verb.