Sentence:  Heywood Broun wrote : `` Belle Poitrine is the most original thinker since Caligula '' , and even F. D. R. had to <WSD>concede</WSD> that `` if the rest of this nation showed the foresight and patriotism of Miss Poitrine , America would rapidly resemble ancient Babylon and Nineveh '' . 
Meaning of the word marked with <WSD> tags:  be willing to concede