the category which he will be competing is ornamental/celtic.

How would the previous sentence be correctly capitalized?
Answer: The category which he will be competing is Ornamental/Celtic.
his grandfather died two years later and william came back to live with his mother, but she died shortly after his return and he was sent to live with his father's brothers.

How would the previous sentence be correctly capitalized?
Answer: His grandfather died two years later and William came back to live with his mother, but she died shortly after his return and he was sent to live with his father's brothers.
snuggie™: provides a secure fit of the processor to the ear.

How would the previous sentence be correctly capitalized?
Answer: Snuggie™: Provides a secure fit of the processor to the ear.
date company was established: certificates: iso 9001:2008

How would the previous sentence be correctly capitalized?
Answer: Date company was established: Certificates: ISO 9001:2008