请帮忙划分一下英语句子结构 7、Moreover,in addition to its

题目

请帮忙划分一下英语句子结构 7、Moreover,in addition to its
7、Moreover,in addition to its being a transportation pathway equipped with a mammoth physical plant of tracks signals,crossings,bridges,and junctions,plus telegraph and telephone lines the railroad nurtured factory complexes,coat piles,warehouses,and generating stations,forming along its right,of-way what has aptly been called “the metropolitan corridor” of the American landscape.

答案

主语是the railroad,谓语动词是nurtured,forming 是现在分词作状语表示伴随,what has aptly been……这个从句是做forming的宾语.