Complex sentence: Her father, who by then was institutionalized in the Oklahoma Hospital for the Insane in Norman, was able to travel the 35 miles to Shawnee and the two got reacquainted.
Split into simpler sentences: Her father, who by then was institutionalized in the Oklahoma Hospital for the Insane in Norman. He was able to travel the 35 miles to Shawnee and the two got reacquainted.