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This paper presents a simple way to incorporate word duration constraints by unrolling HMMs to form a lattice where word duration probabilities can be applied directly to state transitions .
 unrolling HMMs, word duration constraints; unrolling HMMs, lattice; word duration probabilities, state transitions
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 unrolling HMMs, word duration constraints; unrolling HMMs, lattice; word duration probabilities, state transitions