下面這個of開頭的句子主謂賓，定狀補是什麽，請高人指點並翻譯壹下

the most far-reaching 是句子主語has been 系動詞 the inexorable decline in the scope and seriousness of their arts coverage是表語Of all the changes that have taken place in English-language newspapers during the past quarter-century狀語，是主---系---表句型；而that have taken place in English-language newspapers during the past quarter-century是定語從句做the changes 的定語，明白了嗎？