Complex sentence: On the 29th of October he was wounded while dressing the wounds of Private Tagge a fellow soldier, shrapnel entered his right side, twelve inches in up to his shoulder blade and came to rest on his right lung.
Split into simpler sentences: On the 29th of October he was wounded whilst dressing the wounds of Private Tagge a fellow soldier. Shrapnel entered his right side, twelve inches in up to his shoulder blade and came to rest on his right lung.