['In', 'addition', ',', 'there', 'is', 'interesting', 'speculation', 'that', 'semiclathrate', 'hydrate', 'may', 'be', 'regarded', 'as', 'a', 'representative', 'substance', 'for', 'the', 'study', 'of', 'thermal', 'conductivity', 'in', 'clathrate', 'hydrate', 'in', 'general', '.']