Complex sentence: The story takes place on a farm, and a family of field mice make an attempt to move to a different territory to find better food, however, Mr. Ocax, the Great Horned Owl who offers protection to the mice does not allow it.
Split into simpler sentences: The story takes place on a farm, and a family of field mice make an attempt to move to a different territory to find better food. However, Mr. Ocax, the Great Horned Owl who offers protection to the mice, does not allow it.