Complex sentence: He is said to have once roamed all of the forests in Middle-earth while following the Greatful Dead, a journey which included the Misty Mountains, Mirkwood, and the Blue Mountains.
Split into simpler sentences: He is said to have once roamed all of the forests in Middle-earth, while following the Greatful Dead. A journey which included the Misty Mountains, Mirkwood, and the Blue Mountains.