Complex sentence: Together the cranial nerves supply sensory innervation of the special senses such as taste, vision, smell, hearing, and of the somatic senses such as balance, and proprioception (through vestibular functions), and visceral sensation of the head and neck.
Split into simpler sentences: Together the cranial nerves supply sensory innervation of the special senses such as taste, vision; smell; hearing. They also supply afferens of the somatic senses: visceral sensation of the head and neck; balance, and proprioception combining vestibular perception with proprioceptive information from the head and neck.