Complex sentence: Nearby trees include the President tree, the Washington tree, Adams Tree and the Franklin (tree); all these trees are of great size, although the Washington Tree lost the hollow upper half of its trunk in 2005 after a fire.
Split into simpler sentences: Nearby trees include the President tree, the Washington tree, Adams Tree and the Franklin (tree). All these trees are of great size, although the Washington Tree lost the hollow upper half of its trunk in 2005 after a fire.